题目内容
—There must be a dozen pens in this house but I can never find one when I need one.
—Keep looking. ________ is sure to turn up.
A. One B. It C. That D. This
答案:A
提示:
提示:
根据句意“继续找吧,总有一支会出现的”,并不是特指哪一支,it,this,that都是特指,只有one是泛指,指one of the pens“其中一支”。
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