单选题
To make up an objective test, the teacher writes a series of questions, ______ has only one correct answer.
A、
some of which
B、
which
C、
each of which
D、
that
【正确答案】
C
【答案解析】
本题考查非限制性定语从句。句意为：为了组织一场客观的考试，老师准备了几份试卷，每一份试卷都只有惟一的正确答案。
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