of them has been to Australia several times, so they know the Opera House very well.A. Bot

发布时间：2020-08-21 10:03:41

    of them has been to Australia several times, so they know the Opera House very well.
A. Both
B. All
C. None
D. Each

网友回答

A. Both
B. All
C. None
(答案→)D. Each
解析：根据后文动词为has。故选D
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