After half a year’s training, they were made entirely used underwater.A. stayB. to stayC.

发布时间：2020-08-16 12:32:49

After half a year’s training, they were made entirely used            underwater.
A. stay
B. to stay
C. to staying
D. staying

网友回答

A. stay
B. to stay
(答案→)C. to staying
D. staying
解析：考查短语搭配。be used to doing sth习惯于某事，这里是适应的意思。句意：经过多年的训练,他们已经完全适应在水下。
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