新概念英語練習冊第53課答案

也沒說明白是新概念第幾冊呀，這樣別人是沒法給你答案的，呵呵。

Lesson 53
A
1. have just put out, put out, have been putting out
2. have been trying, tried, have tried
3. have been smoking, have already smoked, smoked
4. thought, has thought / has been thinking, has been thinking
B
1. away 2. quiet 3. to 4. at 5. quite
6. drop 7. fell 8. reason 9. cause 10. caused
C
1. a 2. c 3. c 4. c 5. b 6. c