Any packet ____ properly will not be accepted by the post office.

题目

Any packet ____ properly will not be accepted by the post office.
A.not to be wrapped
B.not bing wrapped
c.not wrapped
d.not having been wrapped
为什么选C?包裹不是应该用被动吗?

答案

any packet will not be accepted by the post office.已经是一个完整的句子,在没有从句结构的条件下,用动词的过去式做定语表示被动.
这句用定语从句表达为:any packet which is not wrapped properly will not be accepted by the post office.