Rewrite the sentences. Use must, can't
or may.
1 I'm sure Pete isn't coming to work today. Pete
2 It's possible that he destroyed the documents. He
3 I don't think we'll have a meeting tomorrow.
4 It's certain that they were arguing when I saw them. They
5 It's possible that Bill was working late yesterday.
6 I'm sure he's telling the truth.
7 It's certain that she didn't resign. She
8 Perhaps Marta hasn't found a part-time job yet. Marta
9 I'm sure that is the new office manager. That
10 It is certain that the company is planning to take on more staff.