【正文】
A. was walking。 will start ( ) 9. The young man saw his girl friend off at the railway station and he her through the window until the train disappeared in the distance. A. saw B. watched C. noticed D. found ( )10. We must fight pollution so that it won’t destroy (破壞 ) our good life. A. against B. for C. to D. about Key: Ⅰ . 1. when 2. Since 3. until 4. while 5. before Ⅱ . 1. going 2. turn 3. are told 4. es 5. was 6. is finished 7. is needed 8. returns 9. has made 10. stopped Ⅲ . 15 CDABC 610 DDBBA 。 was knocking C. was walking。 knocked B. walk