[单选题]Mary filled in the application form, but she didn’t know which office ( ).

A

to be sent to

B

to send it to

C

to be sent

D

to send it

正确答案:B
题目解析

句子还原是to send it to that office,要换成定语从句office作为先行词提前,并把that 换成 which修饰office。

句意:玛丽填了申请表,但她不知道把它寄到哪一个办公室。

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