12. Tom realized that he ________ his physics book at home when he reached school.

　　　 A. left　　　　　 B. had left　　　 C. was leaving　　 D. leaves

11. In Sweden, people don’t need to _______ too much money on presents, instead, making a meal is enough.

　　　 A. spend　　　　 B. take　　　　 C. pay　　　　　 D. cost

10. -- Can we make this plan a week later?

　　　　 -- No, we can’t put off _______ it because the meeting is only two days from now.

　　　 A. to make　　　 B. making　　　　 C. make　　　　 D. made

9. --When _____ the abacus _____?　 　-- In the sixth century by the Chinese people.　　　　 A. is, invented　 B. did, invent　　 C. was, invented　 D. does, invent

8. We have been friends for nearly twenty years. Nothing can break off our _______.

　　　 A. friendship　　 B. pleasure　　　 C. decision　　　 D. experience

7. In our city, ________ college students want to work as a teacher in holidays.

A. thousand　　 B. thousands of　 C. thousand of　 D. two thousand of

6. I don’t like eating chocolate. The taste is too ________.

A. crispy　　　　 B. delicious　　 C. salty　　　　 D. sweet

5. -- Look at the boy running on the ground. Is it David?

-- It _______ be him. I saw him go to the teacher’s office just now.

A. might　　　　 B. could　　　 C. can’t　　　　 D. mustn’t

4. They’ve got two machines, but ________ works well.

　　　 A. neither　　　 B. either　　　　 C. all　　　　　 D. both

3. The teacher asked me to ____ the exercise books before we began to do our homework.

A. put up　　　 B. give out　　　 C. hang out　　　 D. fix up