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Present and Past speculation
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4. You failed the exam, so your answers must / can’t have been wrong.
must
Oops!
Okay!
2. You can’t / may remember me – we met on a trip to China last year.
may
Oops!
Okay!
8. Wendy’s accent is a bit strange. She could ___ (be) Northern Irish, but I’m not sure.
be
Oops!
Okay!
5. I’m not sure if you are right. You could / can’t have made a mistake.
could
Oops!
Okay!
1. The key can’t / must be somewhere here but I can’t find it right now.
must
Oops!
Okay!
3. What, you forgot your ticket and passport? You might / can’t be serious!
can't
Oops!
Okay!
9. You can’t ___ (see) Joe in town at noon – he was at home with me.
have seen
Oops!
Okay!
6. I might ___ (leave) my mobile at the hotel but I don’t remember.
have left
Oops!
Okay!
10. Thomas was really upset last week. He must ___ (have) problems at home.
have/ be having
Oops!
Okay!
7. Susan has been travelling for the last two weeks – she must ___ (be) very tired by now.
be
Oops!
Okay!
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