单选题
He is the only one of the students who ______finished the task in time.
A、
is
B、
are
C、
have
D、
has
【正确答案】
D
【答案解析】
考查定语从句,由who引导的定语从句中先行词是the only one,关系代词在从句中作主语,所以动词应该用单数形式,且应该是主动语态。故选D。
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