一、根据英语释义写单词
1. _____________:spread over the surface of sth
2. _____________:use more of something than you should
3. _____________: do what you are told to do
4. _____________: go from one place to another
二、用括号所给单词的适当形式填空。使句子完整、通顺
1.Trees can take in harmful _____________(gas)
2.Our drinking water comes from two clean_____________(stream)
3.Jim bought his mother a _____________(value)
三、同义句转换
1.The flowers will die without water
______________________________________
2.The boys try to clean the window up
______________________________________
3.It is not difficult for me to climb the mountain
______________________________________