9.　　　 She earned her living _______ selling vegetables.

A. with　 B. as　　 C. by　　 D. in

8.　　　 Our defeat was due to a lack ______ experience.

A. in　　 B. for　 C. of　　 D. to

7.　　　 The old man _______ the story where he left off.

A. took over　 B. took up　 C. took on　　 D. took off

6.　　　 I want to clean the room because the room really requires __________-.

A. cleaning　 B. to clean　 C. being cleaned　 D. cleaned

5.　　　 Taking this kind of medicine, if ________ , will surely produce side effect.

A. continue　 B. having continued　　 C. continuing　 D. continued

4.　　　 Swan lake is a famous ballet in four acts, _______ on a German fairy tale.

A. basing　 B. based　　 C. bases　　　 D. to base

3.　　　 The research is so designed that once __________ nothing can be done to change it.

A. begins　　 B. having begun　　 C. beginning　　　 D. begun　

2.　　　 ________ in thought, he almost ran into the car in front of him.

A. Losing　　 B. Having lost　 C. Lost　　 D. To lose

1.　　　 Though _____________ money, his parents managed to send him to university.

A. lacked　　　　 B. lacking of　　 C. lacking　　 D. lacked in

9.　　　 Suddenly he caught sight __________ a snake and he was frightened ________ it.