.—Would you like to stay for another two days? —Sorry I . One of my best friends is comin

问题补充：

.

—Would you like to stay for another two days?

—Sorry, I . One of my best friends is coming to see me.

A. mustn’t

B. can’t

C. needn’t

D. ought not to

答案：

A. mustn’t

(答案→)B. can’t

C. needn’t

D. ought not to

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