用所给单词的适当形式填空。
It’s cold today．We must keep the windows ________．(close)
Daniel and his friends enjoyed ________(they)at the robot exhibition center last week．
You’d better ________(buy)a new pair of shoes．
Are you ________(interest)in the robot that can do homework?
Mr．Hu told us to do our homework as ________(quick)as we could．
I think English is ________(difficult)than science．
Millie is good at ________(dance), but Amy isn’t．
It’s spring．The ________(leaf)on the tree have turned green．
用所给词的正确形式填空。
Earth will be too polluted ________(live)on．
They make him ________(water)the flowers．