20. 　　　　　　　　　　　　　　　　 In the past I ____ after supper, but now I ____ TV after supper.

　　　 A. used to go out for a walk; am used to watching

　　　 B. used to going out for a walk; used to watch

　　　 C. used to go out for a walk; am used to watch

　　　 D. used to go oul for a walk; am used lo watched

19.　 When he stood before the crowd, he felt uneasy with all the eyes____him.

　 A. focusing on　　　 　 B. focused on　　　 C. focused with　　 　　 D. focusing with

18. 　　　　　　　　　　　　　　　　 Seeing the drowning girl in the river, the soldiers Jumped into it to save her ____ being drowned.

A. at his own risk　　　　　　　　　　 　　 B. took the risk of

C. faced the risk of　　　　　　　　　　 　　 D. at the risk of

17. ____ from heart trouble for years, Professor White has to lake some medicine with him wherever he goes.

　　　 A. Suffered　　　 　　　 B. Suffering　　 　　　　 C. Having suffered　 D. Being suffered

16.　　　　　　　　　　　　　　　　　 In order to master a foreign language you have to spend more time ____ it, not just ____it.

　 A. learning; learning　　　　　　　　　 　　 B. learning about .learning

　 C. learning; learning about　　　　　　 　　 D. learning about ,learning about