22. Though ________money, his parents managed to send him to university.

A. lacked　　　　　　　 B. lacking of　　　　　　

C. lacking　　　　　　 　D. lacked in　　　　　　　　　

21. Tony was very unhappy for ________ to the party.

　 A. having not been invited　　　　　 B. not having invited

　C. having not invited　　　　　　　 D. not having been invited

20. He sent me an-email, __________ to get further information.

　 A. hoped　　　 B. hoping　　　 C. to hope　 　D. hope

19. ________ such heavy pollution already, it may now be too late to clean up the river.

　 A. Having suffered　　　　　 B. Suffering　　　 C. To suffer　　　 D. Suffered

18. __________ at the door before entering please.

　 A. Knocked　　　　 B. To knock　　　　　 C. Knocking　　　 D. Knock

17. One learns a language by making mistakes and __________ them.

　 A. correct　　　　 B. correcting　　　　 C. corrects　　　　 D. to correct

16. European football is played in 80 countries, ________ it the popular sport in the world.

　 A. making　　　 B. makes　　　　 C. made　　　 D. to make

15._________ a reply, he decided to write again.

　 A. Not receiving　　　 　　　B. Receiving not　

C. Not having received　　　 D. Having not received

14. She reached the top of the hill and stopped _________ on a big rock by the side of the path.

　 A. to have rested　　　 B. resting　　 C. to rest　　　　 D. rest

13. They knew her very well. They had seen her _______ up from childhood.

　 A. grow　　　　 B. grew　　　 C. was growing　　　　 D. to grow