13.　　 Once he was considered to be s__________, for he couldn’t work out the simplest numbers.

12.　　 Many of the students take their c_________ into the classroom to help them do some maths work, which is not preferred by the teachers.

11.　　 We have a lot in c________, so we often have a lot to talk about.

10. A library with five thousand books _______ to the nation as a gift.

　A. has been offered 　　 B. has offered; 　　　　　 C. are offered;　　　　　　　 D. have offered;

9. Both my brothers work at the power station that _______ in 1996.

　A. has set up; 　　　　　　 B. has been set up; 　　 C. was set up; 　　　　　　　 D. is set up.

8. --Why does Mary look so unhappy?

--She has________ by her classmates.

　A. laughed;　　　　　　　　　 B. laughed at ; 　　　　　 C. been laughed; 　　　　　 D. been laughed at

7. Three years _________ without our knowing it.

　A. went by; 　　　　　　　　 B. passes by; 　　　　　　 C. went on ; 　　　　　　　　 D. passed on;

6. Last summer I took a course on _______ poisonous gases.

A. how to deal with ;　　 B. what to deal with ; 　 C. how to be deal with ; D. what to be deal with;

5. __________ many old people, he likes this kind of dance.

A. Instead of . 　　　　　　 B. In spite of. 　　　　　　 C. In common with . 　　 D. Instead.

4. --How many elephants have you seen?

-- ____________.

A. No one. 　　　　　　　　　 B. None. 　　　　　　　　　 C. Not many ones. 　　　 D. Not many.