1) It's cold. The air conditioning...... on a) Could be b) Must be c) Can't 2) We...... experiencing a blackout. a) Have to be b) Can be c) Could be 3) It .... too hot for this airconditioner to work a) May be b) Can't be c) Has to be 4) This........... her house. I can see her car in the garage. a) Can't be b) Might be c) Must be 5) Come inside and get warm. You ......... freezing out there! a) Might be b) Must be c) Could be 6) She's not here yet. She .......... stuck in traffic. a) Might be b) Can be c) Must be 7) He's not answering. He ........... in class. a) Has to be b) Must be c) Could be 8) We regret to inform you that some services ....... delayed due to the bad weather. a) May be b) Might be c) Can be 9) It ........ far now. We've been driving for hours. a) Could be b) Can't be c) Must be 10) She .......... about the complaint. She's promoted him to team leader. a) Can't knows b) Has to know c) Can't know 11) It .......... easy for him, looking after three kids on his own. a) Can't be b) Musn't be c) Has to be 12) The house isn't hard to find. It's the red one at the end. You _____ miss it! a) Can't b) Don't c) Couldn't 13) What an amazing trip! You _____ have some incredible photos. a) Musn't b) Must c) Might 14) That _____ be the vegetarian option. It's got chicken in it. a) Musn't b) Can't c) Could 15) Have you got your passport? I'm not sure if you'll need it but they _____ ask you for ID. a) Ask b) Might c) Can

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