I am going to the post office. Do you have any letter ?A. to be sentB. to sendC. sendingD.

问题补充：

I am going to the post office. Do you have any letter ?

A. to be sent

B. to send

C. sending

D. sent

答案：

(答案→)A. to be sent

B. to send

C. sending

D. sent

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