1 . On ________________ (hear) the shots of the race rang out,everyone just rushed forward,only a small thin body was staggering behind. (所给词的适当形式填空)

2 . I last saw Bob about a month ago, when he just ________ (leave) his job. He said he was going to France and ________ (promise) to send me a post card as soon as he found a place to stay. But I ________ (hear) nothing since then. (所给词的适当形式填空)

3 . Upon __________ (hear) the news, his mother burst into laughter. (所给词的适当形式填空)

4 . The girl answered the question in such a low voice that she couldn’t make herself________(hear) by others. (所给词的适当形式填空)

5 . Look at his sad face! He must ________(hear) of the bad news. (用所给词的适当形式填空)

6 . Graham was very difficult before he came into my class. I ______________ (hear) stories about his bad behavior. （所给词的适当形式填空）

7 . I was shocked ________ (hear) that our factory would have to close. (所给词的适当形式填空)

8 . The children talked so loudly at dinner table that I had to raise my voice and struggle_________(hear). (所给词的适当形式填空)

9 . The music was so loud that she could hardly make herself________(hear). (用所给词的适当形式填空)