20. Xiang Yufang worked __________ for a few years and then came back to China _______ the aeroplane.

　 A. board; on abroad　　　　　　　　　　　 B. abroad; on the board

　 C. abroad; on board　　　　　　　　　　　 D. on board; abroad

19. ---Does it rain a lot in the desert?

　 ---　　 　, it hardly ever rain.

A. On the other hand B. On the contrary C. Compared with D. For one thing

18. With all his money and friends 　　　　, he was now in great despair.

A. going 　　　　　　　 B. gone 　　　　 C. be gone　　　　　　 D. had gone

17. Peter ______ come with us tonight, but he isn’t very sure yet.

A. must　 　　　　　　 B. may　 　　　　　　　 C. can　 　　　　 D. will

16. ______ worried her was _____ she had done might make things worse.

A. What; that　 　　 B. What, where 　　 C. What; what　 　　 D. Who; what

15. I was interested in _____ they had done for you.

A. that　 　　　　 B. all that　 　　　　　 C. all what　 　　　　 D. which