7. Never_______faith in himself, the scientist went on with his research.

　　 A. losing　　　 B. to lose　　　 C. lost　　　　　 D. to be lost

6. This is one of the problems__________at the meeting next week.

　 A. discussed　　　　　　　　　 　　　　B. discussing　

　 C. being discussed　　　　　　　　 D. to be discussed

5. By sunset, we had __________thirty miles.

　　 A. covered at　　　　　　　 B. covered for　

　　 C. covered　　　　　　　　　 D. covered of

4. I can’t remember _________it was five o’clock _____he arrived.

　　 A. whether; when　　　　　 B. that ; that

　　 C. whether ; that　　　　　 　D. that ; when

3. Are you sure the trees can ________the coming cold winter ?

　　 A. survive　　 B. pass　　　 C. overcome　　　 D. live

2. The first textbooks _________for teaching English as a foreign language came out in the 16th century.

　 A. having written　　　　　　　 B. to be written

　 C. being written　　　　　　　　 D. written

1.The castle ________to the 14th century.

　　 A. dates from　　　　　　　　 B. dates back

　　 C. dates at　　　　　　　　　　　 D. dates in

20. His parents didn’t have enough money to ________his higher education.

　　　 A. pay　　　　　 B. pay for　　　　 C. pay off　　　 D. pay back

Unit 20

19. Hope _______the best ; prepare_______the worst.

　　 A. for; /　　　　 B. / ; for　　　 C. for ; for　　　 D. with ; with

18. My friend Bob often comes to the island _________ .But this time he was buried _______because of a hurricane.

　　 A. by sea; in sea　　　　　　 B. by the sea;　 on sea

　　 C. by sea ; on sea　　　　　　 D. by the sea ; at sea