20. －What made Susan so angry?

－____ in the rain for a long time.

A.　　 Being kept waiting　　　　　　　　　 B. Being kept to wait

C. Because of waiting D. She was kept waiting

19.　 -- Do you mind my opening the window? It’s a bit hot in here.

--________, as a matter of fact

A. Go ahead　　　　　　　　　　　　 B. Yes, my pleasure　　　　　　　　　 C. Yes, I do　　　 　　　　 D. Come on

18.　 I’ve been working all day, but I feel as if I _______ nothing.

A. have been achieved　　 B. were achieving　　 C. had achieved　　 　　 D. am achieving

17. －Look! How busy the building workers are!

－Yes, I see. The houses ____ by them will be completed next week.

A. built　　　　　　　　　　　　　　 B. being built　　　　　　　　 C. to be built　　　　　　　　　　　 D. having been built

16. They ______ to accept me as a full-time student of their university.

A. rejected　　　　　　　　　　 B. refused　　　　　　　　　　　 C. turned down　　　　　　　　　 D. said no