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

10.　　 I couldn’t resist the ____ offer and began to work in his company.　　　　　 　A. inviting　　 B. invited　　　 C. invite　 D. invites

9.　 This is a story completely ____ by him, so don’t trust him.　　　　　　　　　　　 A. discovered　 B. invented　　 C. found　　 D. known

8.　 He goes to school by bus _____ foot.　　　　　　　　　　　　　　　　　　　 A. instead　　 B. instead of　　　 C. instead on　　 D. instead of on

7.　 Can you imagine such a sweet girl as her ____ so ?　　　　　　　　　　　　　　　 A. do　　　 B. to do　　 C. did　　　 D. doing

6.　 Tom thinks John is his best friend but John often speaks ______ of him. If Tom knew it, how disappointed he would feel!　　　　　　　　　　　　　　　　　　 A. bad　　　 B. highly　　　 C. well　　　 D. ill