1,A .must 是情态动词后面接动词原形
2,A .","后面的句子其实是个祈使句.肯定句用DO(可以省略,不省略表示强调),否定用 DO NOT
We must ( )to school at seven thirty.
We must ( )to school at seven thirty.
A go
B going
C are going
2.Lily,( )the window.
A don't close
B doesn't close
C isn't closing
请说明理由
A go
B going
C are going
2.Lily,( )the window.
A don't close
B doesn't close
C isn't closing
请说明理由
英语人气：344 ℃时间：2020-04-03 22:22:44
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