everybody enjoys fresh cut flowers around his housefew people know how to keep them for a

发布时间：2020-08-17 13:46:51

    everybody enjoys fresh cut flowers around his house．few people know how to keep them for as long as possible．
A. Because
B. Since
C. While
D. If

网友回答

A. Because
B. Since
(答案→)C. While
D. If
解析：while引导让步状语从句。
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