A balloon as it is filled with air.A. is increasedB. increasesC. expandsD. is expanded

发布时间：2020-08-16 18:01:29

A balloon      as it is filled with air.
A. is increased
B. increases
C. expands
D. is expanded

网友回答

A. is increased
B. increases
(答案→)C. expands
D. is expanded
解析： 句意：气球灌入空气就会鼓起。expand扩展，鼓起，膨胀，被动语态不合适，故选C。
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