题目内容
— How much shall I pay for the phone cell?
— You _______. It’s free of charge.
— You _______. It’s free of charge.
| A.shouldn’t | B.can’t | C.don’t have to | D.mustn’t |
C
略
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题目内容
| A.shouldn’t | B.can’t | C.don’t have to | D.mustn’t |