11. Smoking hurts not only the smokers, but also the people around them _______ second-hand smoke.

　　A. because B. because of

　　C. as D. as of

　　12. To her disappointment, her best friend did not _______ at her birthday party.

　　A. turn over B. turn around

　　C. turn up D. turn in

　　13. How I wish I could bring _______my children in an environment close to nature!

　　A. about B. in

　　C. out D. up

　　14. When the fever eventually _______, he is likely to feel tired and weak for a while.

　　A. dies down B. dies out

　　C. loses D. leaves

　　15. She had to _______ after the first round because she sprained her wrist.

　　A. run out B. drop out

　　C. draw out D. come out

　　16. It was Allen who _______ with the bright idea to have a barbecue near the lake.

　　A. went up B. came along

　　C. went along D. came up

　　17. Humor is a most _______, yet frequently neglected means of handling the difficult situations in our lives.

　　A. affirmative B. affectionate

　　C. efficient D. effective

　　18. Hardly had he arrived at the airport _______ he was told that the flight had been cancelled.

　　A. than B. when

　　C. before D. then

　　19. The decision _______ how much money should go to education is of vital importance.

　　A. due to B. owing to

　　C. as to D. so as to

　　20. I know she didn’t pass the qualifying exam, but really she is _______ but stupid.

　　A. anything B. nothing

　　C. something D. none