21. I don’t feel equal ______ doing the job. It’s too difficult for me.

　 A. for　　　　 B. to　　 　　 C. in　　　　　 D. on

20. -How did it ______ that all the flowers died?

　 -I had forgotten to water them.

　 A. come about　 B. come back　　　 C. come on　　 D. come down

19. ______ the playground, we learned that the football match had already begun.

　 A. Arrive　 B. To arrive　　 C. Arriving at　 　　　 D. Arrive at

18. If you know anything ______ about it, you should tell us.

　 A. after all　 B. all in all　 C. at all　　　 D. first of all

17. Do you have any difficulty ____ these flowers? I’d like to help you if you need.

　 A. to plant　 B. for planting　 C. with planting　 D. in planting

16. -May I have a look at those books？　 -__________.

　 A. Not at all　 B. That’s right　 C. Be my guest D. You’re welcome

15. -Peter didn’t come to the meeting this morning.

　 - I _______ him yesterday, but I was too busy and forgot it.

　 A. should tell　　 B. should have told　　　　　　 C. had to tell　 D. had told

14. He fell asleep with a book ______ open on his knee.

　 A. lay　 　　　　 B. laying　　　 　　　 C. laid 　　　 D. lying

13. I am sorry: I can’t ______ your opinion about this question.

　 A. argue　　 　　 B. share 　　　 C. have 　 　　　D. agree

12. - I suppose she is 30 years of age.　 - ___________

　 A. You guess it!　 B. You will guess it!　　 C. You’re guessing it!　　 D. You guessed it!