20. It ______ last night ______ Tom saw an interesting film in Dongfeng Cinema.

A. is; that　　　　　 B. was; that　　　　　 C. was; which　　　 D. was; who　

19. Only when class began ______that he had left his book at home．

A. will he realize　　 B. he did realize　　 C. did he realize D. had he realized　

18. - How was your job interview?

- Oh, I couldn’t feel ______. I hardly found proper answers to most of the questions they asked.

A. better　　　　　 B. easier　　　　　　 C. worse　　　　　 D. happier　

17. -Have you found the problem with the computer ?

　 -Sorry. It ______ .

A. is checked　　 B. is being checked　 C. has checked 　D. was being checked

16. -Tom, you are smoking again?

-______? It’s none of your business.

A. So what　　 　 　B. How come　　 　 　C. Why not　　　 D. What for