题目内容
—There must be a dozen paper clips in these drawers but I can’t find one when I need one.
—Keep looking .is sure to turn up.
A.One B.It C.That D.This
A
one为代词,代指想找的one of the paper clips,为不特定的一个,而it/that/this均指代前文出现的同一事物。
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