资料简介：    练习一
A） 根据括号中所给的汉语写出单词，使句子意思完整正确。
1. Little Jim is ______________ (独自的) at home when his parents got to work.
2. The earthquake in Taiwan made a lot of people ________(无家可归).
3.Summer is his favourite season because he likes ______________ (游泳).
4. Be quiet! I heard someone _________(哭) in the bush.
5.There is more and more air ________( 污染) in the big cities.
B） 根据句子意思，用括号中所给单词的适当形式填空。
6. I know only one of the ____________ (visit), how about you?
7. It’s _________(danger) for the boys to play on the street.
8. It’s _______(usual) for Sandy to stay at home at weekends because she is outgoing.
9. My father was watering flowers in the garden while I _________ (read) in it.
10. When his favourite match began, he stopped ________ (play) the computer game.
练习二
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