单选题
The publishers will send you a specimen copy of their new books ______.
A、
when it will be requested
B、
when they are requested it
C、
when it is requested
D、
when requested
【正确答案】
D
【答案解析】
惯用搭配题。关键点：when requested是when they are requested by you的省略式。when，while等引导时间状语从句时，这种省略常出现。句意：如果你要求，出版商会把他们的新书给你寄个样本来。
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