一、答案
| 1 | 2 | 3 | 4 | 5 | 6 |
| A | B | D | B | B | B |
二、答案
1. While
2. when
3. were
4. was
5. were
三、答案
1. was reading
2. was raining
3. was explaining
4. lying
5. was watching
6. was listening
7. was talking
四、答案
(1) come
(2) doesn't want
(3) smoked
(4) coming
(5) to catch
(6)threw
(7) was huming
(8)was