Battery-operated slippers are used seeing in the dark.A. toB. asC. byD. for

发布时间：2020-08-22 15:08:28

Battery-operated slippers are used      seeing in the dark.
A. to
B. as
C. by
D. for

网友回答

A. to
B. as
C. by
(答案→)D. for
解析：to到，对于；as由于，作为；by通过；for为了。句意：电动拖鞋被用来在黑暗中看见东西。For后接名词性短语，表示原因，故选D。
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