The scientist said videophone could be used the conferences.A. intoB. atC. forD. to

发布时间：2020-08-15 01:44:16

The scientist said videophone could be used      the conferences.
A. into
B. at
C. for
D. to

网友回答

A. into
(答案→)B. at
C. for
D. to
解析：这里的at the conferences意思是：在会议上。
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