Question 1
The butler _____ be the thief because he was serving drinks when the necklace disappeared.
Options: must, can't
Must and Can't - Mystery Dinner Party
Read each sentence carefully and decide what is possible or impossible. Click on each blank and choose the correct answer (must or can’t) from the dropdown menu. Some sentences have more than one blank, so make sure you complete all of them.
Practice 1 of 2
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Question 2
Mr. Williams was talking to the host in front of everyone when the theft happened. He _____ be the thief.
Options: must, can't
Question 3
The gardener _____ have entered through the front door because it was locked from the inside all night.
Options: must, can't
Question 4
Lady Pemberton _____ be lying because her story contradicts the security camera footage.
Options: can't, must
Question 5
The suspect _____ have stolen the painting because he arrived after it went missing.
Options: must, can't
Question 6
The guest in the blue jacket suddenly left the table just before the lights went out and security cameras show him near the safe. He _____ be involved.
Options: can't, must
Question 7
The witness _____ be telling the truth, her description matches the security camera footage perfectly.
Options: can't, must
Question 8
Dr. Watson _____ be the murderer - he was at the hospital performing surgery at the time of death.
Options: must, can't
Question 9
The stolen emerald _____ be in this room because the detector is beeping loudly near the fireplace.
Options: can't, must
Question 10
The accomplice _____ be someone at the dinner table because only guests knew about the secret safe.
Options: can't, must
Practise Must and Can't - Mystery Dinner Party with this interactive fill-in-the-blank exercise of 10 questions. Choose the option that correctly completes each sentence, then submit to check your answers and get instant feedback on every choice.
Practising grammar in real sentences — rather than memorising rules in isolation — is one of the most effective ways to make a structure stick. You can retry as many times as you like to build accuracy and confidence using Must and Can't - Mystery Dinner Party in everyday English.
Looking for more practice? See all exercises for this lesson.