In the past, ice used to used to the air in a room.A. be ;coolingB. be; coolC. being; co

发布时间：2020-08-16 06:09:06

In the past, ice used to      used to      the air in a room.
A. be ;cooling
B. be; cool
C. being; cool
D. being; cooling

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A. be ;cooling
(答案→)B. be; cool
C. being; cool
D. being; cooling
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