根据句意及各题括号中所给的汉语意思或首字母，从下面的方框中选择合适的单词或词组，用其适当形式填空。

1．The head teacher asked us to do a ________(调查)of the uses of computers in village schools．

2．The ________(当地)doctor was called in as soon as the accident happened．

3．She is ________(幸运的)enough to have very good health．

4．Where can I ________(交换)my dollars for pounds?

5．Every year，there are lots of ________(旅游者)seeing sights．

6．I'm sorry to b ________ you, but would you please help me with this problem?

7．The r ________ for the house near my office is about ＄30 a week．

8．The time is a ________ when we must leave for Shanghai．

9．At that time many people s ________ to death because of the lack of food．

10．The World Health O ________ lifted the warning against SARS away from Beijing last week．

11．They walk because they couldn't ________(买得起)a taxi．

12．Of the six people in the plane that crashed, only one ________(幸存)．

13．Mr．Li is an excellent ________(教授)in this university．

14．Nothing desired have been achieved from the experiment ________(到目前为止)．

15．Gulangyu is a ________(迷人的)island that most of us want to visit．

16．A notice of“No ________(停车)”is put up at the square．

17．Police control the ________(交通)in large cities．

18．He is a bus driver by ________(职业)．

19．It's good to our health to take an occasional trip to the countryside to ________(摆脱)the noises and the crowdedness of the city．

20．Dr．Smith and his ________(家属)are visiting the Great Wall．