1 . We were astonished ______ (hear) what she had been engaged in. (所给词的适当形式填空)

2 . Every runner was in his position, and then rushed forward like a flash after ________ (hear) the starting pistol.(所给词的适当形式填空)

3 . 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)

4 . Farmers are deeply disturbed ________ (hear) the bad news. (所给词的适当形式填空)

5 . It upset me ________ (hear) that my suggestion put forward at the meeting was turned down. (所给词的适当形式填空)

7 . 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)

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

9 . I’m upset ________ (hear) that the teenager hasn’t recovered from the operation. (所给词的适当形式填空)

10 . She couldn’t make herself ________ (hear) above the noise of the traffic. (所给词的适当形式填空)