I 用动词的适当形式填空
1 The more trees we ______( plant ) , the better we ______ ( improve ) our environment.
2 I had an accident while I ______ ( play ) football. 3 What __________ ( make ) you _________ ( think ) I’m a farmer.
4 They ________ ( talk ) aobut the news when their teacher came in .
5 I have many hobbies such as ________ ( collect ) old things. 6 Why can you stand ________( work ) so long?
