20. The Pyramid, which　 ________ thousands of years ago,　 ______ Egypt.

A. dates from; is belonging to　　　 B. dates back to; belongs to

C. dated from; is belonged to　　　 D. dated back to; belongs to

19. Many peasants in the north go to the south _____ much money.

　 A. make an attempt at making　　　 B. in attempts to make　　

C. making an attempt to making　　 D. attempt to make

18. As a role model, I don’t think most people can imagine what it’s like ____that close every minute of the day.　

　A. to be watched　 B. watched　　 C. watching　　 D. to watch

17. We should be able to ________ enough money for your ticket.

A. dig up　　 B. look up　　 C. take up 　　D. set up

16. No one could _________ the failure of the experiment as everything went smoothly at first.

A. give an account for　 B. account for　 C. take account of　 D. take into account

15. It was _____ he came back from Africa that year _________ he met the girl he would like to marry.

　A. when; then　　 B. not; until　　 C. not until; that　　 D. only; when