一When did you learn the news that Obama made a trip to Canada as President?一 was on my re

发布时间：2020-08-17 12:03:38

一When did you learn the news that Obama made a trip to Canada as President?
一      was on my return．
A. That
B. It
C. There
D. This

网友回答

A. That
(答案→)B. It
C. There
D. This
解析：B根据句意可以得知，问的是时间，it可以指代时间，属于it的实指用法。
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