Past Modals - Find and Fix

Question 1

I regret missing the deadline; I should of set a reminder.

Question 2

I deleted the only copy, and I deeply regret it; I might have made a backup.

Question 3

You mocked his accent, which was unkind; you might not have done that.

Question 4

Four couriers visited, and all four are equally likely; the unsigned parcel should have come from Ali.

Question 5

Both workshops were equally useful; we could have chose pottery, but freely chose coding and have no regrets.

Question 6

The safe was opened; only Priya knew the code. The only possible conclusion is she might have opened it.

Question 7

Milo was live on video in Madrid then; he can't have signs the paper in Oslo.

Question 8

The sealed lift never opened, so the movers might have used it.

Question 9

Security video proves the visitor must have took the parcel.

Question 10

The announcement was unclear, so the train might've went to platform four.

Question 11

The privacy rule forbade it, but you posted the address publicly; you should have shared it.

Question 12

This is only a guess: the sensor might has recorded the brief movement.