Active Grammar - possibility quiz (guesses and deductions)


Complete the sentences by choosing the correct word(s).
1  There's no reply. He__________ be out.
 can
 must
 can't
 mustn't
2  I've got no idea where she is. Try the library. She____________ be in there.
 might
 can't
 must
 will
3  Look at the way that guy's walking. He__________ be drunk!
 should
 can
 might
 must
4  'I've been working since 5 this morning.'
 'You would be exhausted!'
 'You can be exhausted!'
 'You must be exhausted!'
 'You might be exhausted!'
5  You __________ be hungry again. You've only just had dinner!
 can't
 mustn't
 might
 may not
6  They _____________ got there already. They only left ten minutes ago.
 can't
 must
 must have
 can't have
7  You ________________ left it in the office, I suppose.
 could have
 might have
 must have
 I and 2 are both possible
8  Police are convinced the paintings____________ taken out of the coutry already.
 may have
 must have
 must have been
 might have been
9  They _____________ got in through the window - it's on the 21st floor!
 can have
 must have
 can't have
 might have
10  Judging by the present evidence, we think he ________________ used a disguise.
 might have
 probably
 might
 1 and 2 are both possible