Your taskChoose the correct answer for each question.0 / 15 selectedYour score0 / 150%Keep practising! Review the explanations below and try again.1The cake tin is completely empty — the kids ___ it while we were out shopping.The cake tin is completely empty — the kids ___ it while we were out shopping.must have finishedshouldn't have finishedmight finishought to finishCorrect answer: must have finished2You ___ the front door when you left — anyone could have walked straight in.You ___ the front door when you left — anyone could have walked straight in.must have lockedshould have lockedmight have lockeddidn't need to lockCorrect answer: should have locked3He looked utterly bewildered the whole time — he ___ a single word of the briefing.He looked utterly bewildered the whole time — he ___ a single word of the briefing.can't have understoodshouldn't have understoodneedn't have understoodmust have understoodCorrect answer: can't have understood4You ___ him about the surprise party — you've completely ruined the moment we've been planning for weeks.You ___ him about the surprise party — you've completely ruined the moment we've been planning for weeks.can't have toldshouldn't have toldmight have toldneedn't have toldCorrect answer: shouldn't have told5Maria didn't call last night and isn't answering today — she ___ her phone somewhere.Maria didn't call last night and isn't answering today — she ___ her phone somewhere.must have lostshouldn't have lostneedn't have lostought to loseCorrect answer: must have lost6The venue changed at the last minute — they ___ the guests by email instead of leaving them stranded outside.The venue changed at the last minute — they ___ the guests by email instead of leaving them stranded outside.must have warnedshould have warnedcould have warneddidn't need to warnCorrect answer: should have warned7The window is shattered outwards from the inside — the intruder ___ in through it.The window is shattered outwards from the inside — the intruder ___ in through it.can't have comeshouldn't have comemustn't have comeneedn't have comeCorrect answer: can't have come8You ___ much more clearly — the people at the back complained they couldn't hear a thing.You ___ much more clearly — the people at the back complained they couldn't hear a thing.must have spokenshould have spokenmight have spokencan't have spokenCorrect answer: should have spoken9Only the head of department has a key to the secure cabinet, so she ___ it unlocked over the weekend.Only the head of department has a key to the secure cabinet, so she ___ it unlocked over the weekend.must have leftshould have leftneedn't have leftought to leaveCorrect answer: must have left10The contract is missing a crucial liability clause — your solicitor ___ a mistake that obvious.The contract is missing a crucial liability clause — your solicitor ___ a mistake that obvious.shouldn't have missedcan't have missedmust have misseddidn't need to missCorrect answer: shouldn't have missed11The garden was covered in fresh footprints when we woke up — someone ___ there during the night.The garden was covered in fresh footprints when we woke up — someone ___ there during the night.must have beenshouldn't have beenmight have beenneedn't have beenCorrect answer: must have been12The quarterly figures don't reconcile with the bank statement — accounts ___ the totals before signing off.The quarterly figures don't reconcile with the bank statement — accounts ___ the totals before signing off.ought to have checkedmust have checkedmight have checkeddidn't need to checkCorrect answer: ought to have checked13He claimed he was at home all evening, but security cameras placed him at the office — he ___ the truth.He claimed he was at home all evening, but security cameras placed him at the office — he ___ the truth.can't have toldshouldn't have toldmustn't have toldneedn't have toldCorrect answer: can't have told14You lost a whole month's work in that crash — you really ___ the files before deleting the old version.You lost a whole month's work in that crash — you really ___ the files before deleting the old version.should have backed upmust have backed upneedn't have backed upmight have backed upCorrect answer: should have backed up15There's nobody answering at the front door, and their car is gone — they ___ down to the park with the dog.There's nobody answering at the front door, and their car is gone — they ___ down to the park with the dog.might have goneshould have goneshouldn't have goneneedn't have goneCorrect answer: might have goneCheck AnswersPlease select an answer for at least one question first.Found an error in this exercise? Let us know.