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题目
They needed to ask someone for help.(改否定句)
They ( )( )to ask ( )for help.
Mrs.Green needn't worry about her son.He's safe.(同义句替换)
Mrs.Green ( )( )( )worry about her son.He's safe.

提问时间:2020-11-26

答案
didn·t need anyone
doesn·t need to
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