Объяснение:

1.I'm not sure the books were returned on time.

2.it can't be that he became a doctor.

3.he shouldn't have been given so much candy yesterday.

4.you probably already received the money.

5. Was it really that cold

6.Perhaps this house was built in the last century.

7.I am sure that mistakes will be corrected by the teacher.

8. he may quit smoking (although unlikely)

9.you can't believe it.

10.they are sure that someone else is writing it.

11. without a doubt, she worked from 6 o'clock

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