True friendship is like sound health, whose value is seldom known it is lost.A. whenB. tho

发布时间：2020-08-16 08:07:47

True friendship is like sound health, whose value is seldom known        it is lost.
A. when
B. though
C. until
D. unless

网友回答

A. when
B. though
(答案→)C. until
D. unless
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