Проверьте пожалуйста грамматику. Завтра экзамен

1. Everything is alright. Now you see that you must not have worried
a)must not have worried b) need not have worried c) did not have to worry
2. Children can borrowbooks from the school library may borrow
a) can borrow b) is allowed borrow c) might borrow d) may borrow
3. I may wreck my own life, but I will not let you wreck yours
a) may wreck b) may have wrecked c) can have wrecked
4. may be it seven o clock now?
a) can it be b) could be it c) may it be d) may be it
5) They decided that she is to send them a telegram every tenth day
a) had b) is c) was d) were
6) I has to wear glasses as my eyesight is very weak
a) must b) has to c) am to d) have to
7. we must not carry the bookcase upstairs : it is too heavy.
a) can not b) must not c) need not d) may not
8. can I take this book for a little while?
a) can b) must c) may d)should
9. We asked the teacher if may use dictionaries at the exam
a) may b) would be allowed to c) will be allowed to
10. He must have taken there by car
a) may have taken b) must have taken c) must have been taken