[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"grammar-exercise-019d49e9-3dac-7509-81aa-d6b84041272d":3,"grammar-exercise-lesson-019ba7d2-7094-7519-b0f1-7b9c0b8d1a84":217},["Reactive",4],{"id":5,"grammarPage":6,"title":7,"instructions":8,"displayOrder":9,"questions":10},"019d49e9-3dac-7509-81aa-d6b84041272d","\u002Fapi\u002Fgrammar_pages\u002F019ba7d2-7094-7519-b0f1-7b9c0b8d1a84","Guessing What Happened","This is a fill-in-the-blank exercise. Click on each blank and choose the correct answer from the dropdown.\nSome sentences may have more than one blank, so make sure you complete all of them.\nUse modal verbs (e.g., must, might, could, can’t) to make deductions and speculations about workplace situations based on the clues given.",0,[11,33,51,67,84,102,118,134,150,166,182,201],{"id":12,"sentenceTemplate":13,"displayOrder":9,"explanation":14,"exampleSentence":15,"blanks":16},"019d49ec-29f4-7a5a-a75d-b76d08559857","The office lights are still on at midnight, and several computers are running. Someone __1__ working late to meet the project deadline.","Use \"must be\" for strong present deduction based on clear evidence. The lights and active computers strongly suggest that someone is working now.","Her car is in the parking lot. She must be in the building somewhere.",[17],{"id":18,"blankNumber":19,"options":20},"019d49ec-29f2-7558-846f-fffd86ad4fbd",1,[21,25,29],{"id":22,"optionText":23,"isCorrect":24,"displayOrder":9},"019d49ec-29f2-718c-846f-fffd841316e7","must be",true,{"id":26,"optionText":27,"isCorrect":28,"displayOrder":19},"019d49ec-29f2-7220-846f-fffd84bed39d","can't be",false,{"id":30,"optionText":31,"isCorrect":28,"displayOrder":32},"019d49ec-29f2-7270-846f-fffd85b51a70","might have been",2,{"id":34,"sentenceTemplate":35,"displayOrder":19,"explanation":36,"exampleSentence":37,"blanks":38},"019d49ec-29f4-7c0e-a75d-b76d0b0196bc","Tom's desk is completely empty and his nameplate is gone. It's possible that he __1__ resigned or been transferred recently.","Use 'might have' for speculation about the past when the evidence suggests possibility but not certainty. We don't have definite proof of what happened.","The meeting room is locked. They might have finished early and gone home.",[39],{"id":40,"blankNumber":19,"options":41},"019d49ec-29f4-7bc2-a75d-b76d0ac7c1ec",[42,45,48],{"id":43,"optionText":44,"isCorrect":28,"displayOrder":9},"019d49ec-29f4-7b72-a75d-b76d097a5872","must have",{"id":46,"optionText":47,"isCorrect":24,"displayOrder":19},"019d49ec-29f4-7b36-a75d-b76d089ad34f","might have",{"id":49,"optionText":50,"isCorrect":28,"displayOrder":32},"019d49ec-29f4-7b9e-a75d-b76d0a12da00","can't have",{"id":52,"sentenceTemplate":53,"displayOrder":32,"explanation":54,"exampleSentence":55,"blanks":56},"019d49ec-29f4-7cfe-a75d-b76d0ce736b9","Sarah's presentation file shows it was last modified at 3 a.m. She __1__ stayed up all night to finish it.","Use 'must have + past participle' for strong deduction about a past event based on clear evidence. The 3 a.m. timestamp provides strong proof.","The report is perfect. He must have checked it several times before submitting.",[57],{"id":58,"blankNumber":19,"options":59},"019d49ec-29f4-7cc6-a75d-b76d0c6e5f6c",[60,63,65],{"id":61,"optionText":62,"isCorrect":28,"displayOrder":9},"019d49ec-29f4-7c82-a75d-b76d0b8b4f3f","might be",{"id":64,"optionText":50,"isCorrect":28,"displayOrder":19},"019d49ec-29f4-7ca6-a75d-b76d0bcbf405",{"id":66,"optionText":44,"isCorrect":24,"displayOrder":32},"019d49ec-29f4-7c5e-a75d-b76d0b2a924d",{"id":68,"sentenceTemplate":69,"displayOrder":70,"explanation":71,"exampleSentence":72,"blanks":73},"019d49ec-29f4-7de2-a75d-b76d0e5721e8","The conference room is fully set up with 50 chairs, name tags, and presentation equipment. They __1__ expecting a large meeting later today.",3,"Use 'must be' for strong present deduction. The setup of many chairs is clear evidence of current expectations for a large meeting.","The printer is out of paper again. Someone must be printing a huge document.",[74],{"id":75,"blankNumber":19,"options":76},"019d49ec-29f4-7daa-a75d-b76d0d80bf88",[77,80,82],{"id":78,"optionText":79,"isCorrect":28,"displayOrder":9},"019d49ec-29f4-7d8a-a75d-b76d0d137cc7","could have been",{"id":81,"optionText":23,"isCorrect":24,"displayOrder":19},"019d49ec-29f4-7d46-a75d-b76d0d0bf4da",{"id":83,"optionText":27,"isCorrect":28,"displayOrder":32},"019d49ec-29f4-7d6a-a75d-b76d0d0c2db6",{"id":85,"sentenceTemplate":86,"displayOrder":87,"explanation":88,"exampleSentence":89,"blanks":90},"019d49ec-29f4-7eda-a75d-b76d10e9896f","Jake's computer is locked and his coffee is cold. He __1__ away from his desk for quite a while.",4,"Use \"must have been\" for strong deduction about a past or ongoing situation. The cold coffee and locked computer are clear evidence that he has been away for some time.","The whiteboard is full of notes. They must have been brainstorming for hours.",[91],{"id":92,"blankNumber":19,"options":93},"019d49ec-29f4-7e8a-a75d-b76d103cdf07",[94,97,99],{"id":95,"optionText":96,"isCorrect":24,"displayOrder":9},"019d49ec-29f4-7e2a-a75d-b76d0e9b2ac5","must have been",{"id":98,"optionText":62,"isCorrect":28,"displayOrder":19},"019d49ec-29f4-7e4e-a75d-b76d0ec09092",{"id":100,"optionText":101,"isCorrect":28,"displayOrder":32},"019d49ec-29f4-7e6e-a75d-b76d0f667a87","can't have been",{"id":103,"sentenceTemplate":104,"displayOrder":105,"explanation":106,"exampleSentence":107,"blanks":108},"019d49ec-29f5-7121-9b84-a27e9cf8646a","Maria's out-of-office reply says she's away all week and not checking emails. She __1__ on annual leave this week.",6,"Use 'must be' for strong present deduction. The out-of-office message provides clear evidence she is currently on leave.","His calendar is blocked all afternoon. He must be in client meetings.",[109],{"id":110,"blankNumber":19,"options":111},"019d49ec-29f5-70e9-9b84-a27e9c04b3bc",[112,114,116],{"id":113,"optionText":31,"isCorrect":28,"displayOrder":9},"019d49ec-29f5-70ad-9b84-a27e9b4b0c94",{"id":115,"optionText":23,"isCorrect":24,"displayOrder":19},"019d49ec-29f5-7089-9b84-a27e9b48e7a8",{"id":117,"optionText":27,"isCorrect":28,"displayOrder":32},"019d49ec-29f5-70cd-9b84-a27e9be0b65f",{"id":119,"sentenceTemplate":120,"displayOrder":121,"explanation":122,"exampleSentence":123,"blanks":124},"019d49ec-29f5-71f5-9b84-a27ea0533789","David logged in from home this morning and said he has a high fever. He __1__ feeling well enough to come to the office today.",7,"Use \"can't be\" for strong negative deduction about the present. His fever is clear evidence he is not well enough.","She's coughing constantly. She can't be feeling very well today.",[125],{"id":126,"blankNumber":19,"options":127},"019d49ec-29f5-71bd-9b84-a27e9ff720db",[128,130,132],{"id":129,"optionText":27,"isCorrect":24,"displayOrder":9},"019d49ec-29f5-7161-9b84-a27e9df4aa30",{"id":131,"optionText":23,"isCorrect":28,"displayOrder":19},"019d49ec-29f5-7185-9b84-a27e9e83d2bd",{"id":133,"optionText":31,"isCorrect":28,"displayOrder":32},"019d49ec-29f5-71a1-9b84-a27e9f76a3d6",{"id":135,"sentenceTemplate":136,"displayOrder":137,"explanation":138,"exampleSentence":139,"blanks":140},"019d49ec-29f5-73b1-9b84-a27ea548d1d7","There are three candidates waiting outside the HR office, interview schedules posted on the door, and staff calling candidates in one by one. The company __1__ conducting interviews today.",9,"Use 'must be' for strong present deduction about an action in progress. The presence of waiting candidates is clear evidence that interviews are happening now.","The training room is full of new employees. HR must be running an orientation session.",[141],{"id":142,"blankNumber":19,"options":143},"019d49ec-29f5-7379-9b84-a27ea54165be",[144,146,148],{"id":145,"optionText":47,"isCorrect":28,"displayOrder":9},"019d49ec-29f5-735d-9b84-a27ea49e67be",{"id":147,"optionText":23,"isCorrect":24,"displayOrder":19},"019d49ec-29f5-7311-9b84-a27ea39ee439",{"id":149,"optionText":27,"isCorrect":28,"displayOrder":32},"019d49ec-29f5-733d-9b84-a27ea47b410c",{"id":151,"sentenceTemplate":152,"displayOrder":153,"explanation":154,"exampleSentence":155,"blanks":156},"019d49ec-29f5-74b9-9b84-a27ea6ed980b","The financial report has been revised three times this morning due to multiple corrections and inconsistencies. There __1__ some errors in the original version.",10,"Use 'must have been' for strong deduction about a past situation. Multiple revisions clearly indicate there were errors originally.","They cancelled the product launch. There must have been serious quality issues.",[157],{"id":158,"blankNumber":19,"options":159},"019d49ec-29f5-746d-9b84-a27ea6ed0e6f",[160,162,164],{"id":161,"optionText":96,"isCorrect":24,"displayOrder":9},"019d49ec-29f5-7409-9b84-a27ea5773dc9",{"id":163,"optionText":27,"isCorrect":28,"displayOrder":19},"019d49ec-29f5-742d-9b84-a27ea5b8b417",{"id":165,"optionText":62,"isCorrect":28,"displayOrder":32},"019d49ec-29f5-744d-9b84-a27ea5eda626",{"id":167,"sentenceTemplate":168,"displayOrder":169,"explanation":170,"exampleSentence":171,"blanks":172},"019d49ec-29f5-7675-9b84-a27eaa11d03f","Rachel's project folder contains 50 very different design versions with major changes. She __1__  experimenting with many different ideas before choosing the final one.",12,"Use \"must have been\" + -ing for strong deduction about a past ongoing process. The large number of versions clearly shows extended experimentation.","The budget spreadsheet has 20 tabs. The finance team must have been analyzing every department separately.",[173],{"id":174,"blankNumber":19,"options":175},"019d49ec-29f5-763d-9b84-a27eaa06e788",[176,178,180],{"id":177,"optionText":62,"isCorrect":28,"displayOrder":9},"019d49ec-29f5-7621-9b84-a27ea9e7adc8",{"id":179,"optionText":27,"isCorrect":28,"displayOrder":19},"019d49ec-29f5-7601-9b84-a27ea987135d",{"id":181,"optionText":96,"isCorrect":24,"displayOrder":32},"019d49ec-29f5-75dd-9b84-a27ea984a560",{"id":183,"sentenceTemplate":184,"displayOrder":185,"explanation":186,"exampleSentence":187,"blanks":188},"019d49ec-29f5-7755-9b84-a27eac05c0bd","The security log shows the alarm was deactivated and work was completed before Monday morning. Someone __1__ over the weekend to finish urgent work.",13,"Use \"must have + past participle\" for strong deduction about a completed past action. The alarm log clearly shows that someone entered earlier.","The meeting minutes are already uploaded. Someone must have taken notes during yesterday's session.",[189],{"id":190,"blankNumber":19,"options":191},"019d49ec-29f5-771d-9b84-a27eab2eb610",[192,195,198],{"id":193,"optionText":194,"isCorrect":24,"displayOrder":9},"019d49ec-29f5-76b5-9b84-a27eaa3cf888","must have come in",{"id":196,"optionText":197,"isCorrect":28,"displayOrder":19},"019d49ec-29f5-7701-9b84-a27eaac27662","might have come in",{"id":199,"optionText":200,"isCorrect":28,"displayOrder":32},"019d49ec-29f5-76d5-9b84-a27eaa69e51a","can't have come in",{"id":202,"sentenceTemplate":203,"displayOrder":204,"explanation":205,"exampleSentence":206,"blanks":207},"019d49ec-29f5-7829-9b84-a27eae3ac536","The contract was signed and returned within an hour, and the client confirmed they want to start immediately without any delays. The client __1__ very eager to start the project.",14,"Use 'must be' for strong present deduction about someone's state or feelings. The quick response clearly indicates current eagerness.","She accepted the job offer immediately. She must be very interested in the role.",[208],{"id":209,"blankNumber":19,"options":210},"019d49ec-29f5-77f5-9b84-a27eae31124f",[211,213,215],{"id":212,"optionText":47,"isCorrect":28,"displayOrder":9},"019d49ec-29f5-77d9-9b84-a27eadc8fc46",{"id":214,"optionText":23,"isCorrect":24,"displayOrder":19},"019d49ec-29f5-7799-9b84-a27eacac382f",{"id":216,"optionText":101,"isCorrect":28,"displayOrder":32},"019d49ec-29f5-77b9-9b84-a27ead35df28",{"title":218,"slug":219,"language":220},"Deduction & Speculation (Modals)","deduction-speculation-modals","en"]