题目内容
下面每句中有一个错误，请改正
We must do all we can make our world better.
can后加to
We may be able to take measures after it's too late.
Are there any alive things on the moon?
Steve is an expert who tries to keep animals and plants from becoming endanger.
He said he has never been to the states.
The teacher ask the students to answer his questions in turn.
