-Must I finish my homework now ,mom? -No,you_____. A,must B.mustn't C.have to D.don't have to It is useless_____over the spilt milk . A.cry B.in crying C.to crying on D.crying 答的好重重有赏
D.don't have to must的回答一般是needn't = don't have to 的意思.mustn't是禁止的意思,不合题意. D.crying T丶Best丿Foo说的没错,it is useless doing/to do something.固定用法. 模式是 pro+be+adj+ving/to do