20.　　 Though ____ money, they sent their only child to a private school.　　　　　　　 A. lacked　　　 B. lacking　　 C. lacked of　 D. lacking of

19.　　 _____ labor, they invent the new machine.　　　　　　　　　　　　　　　　 A. Saving　　　 B. To save 　　C. Saved　　 D. Save

18.　　 ______ knowledge of English is a must in international trade.　　　　　　　　　 A. The　　 B. /　　 C. A　　 D. An

17.　　 In order to_____ his spare time he invented the word game.　　　　　　　　　　 A. spend　　 B. waste　　 C. spare　　 D. kill

16.　　 Bob is an honest man and he always ____ his word, but I don’t know why he changed his mind at the last moment this time.　　　　　　　　　　　　　　　　 A. breaks　　 B. keeps　　 C. eat　　 D. stick

15.　　 The key _____ to this problem is that we can’t accomplish our task on time.　　 A. point　　　 B. sense　　 C. problem　　 D. matter

14.　　 He can’t have seen you for he ____ into the sky.　　 　　　　　　　　　　　　A. was just staring　 B. was just stared　 C. has just stared　 D. just stared

13.　　 Cloning the sheep ----Dori is a big ____ in science.　　　　　　　　　　　　　 A. progress　　 B. run　　　 C. jump　　 D. rush

12.　　 ____ from his clothes, he can’t be very rich.　　　　 　　　　　　　　　　　A. Judging　　 B. Judged　　　 C. Judge　　 D. To judge

11.　　 At first only I started at the sky, and then a lot of other people _____me.　　　　　 A. joined　　　 B. joined in　　 C. followed　 D. followed with