问题
Catherine, I have cleaned the room for you.—Thanks. You ______ it. I could manage it myself.
A:needn't do
B:needn't have done
C:mustn't do
D:shouldn't have done
B:needn't have done
C:mustn't do
D:shouldn't have done
正确答案是：
同类题型
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_______young people see and hear in themedia helps them to figure out how the world works.
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