题目内容
— Must these old people pay for the medicine? —__________. It is free.
A. No, they needn’t B. No, they mustn’t C. Yes, they must D. Yes, they need
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题目内容
— Must these old people pay for the medicine? —__________. It is free.
A. No, they needn’t B. No, they mustn’t C. Yes, they must D. Yes, they need