You may use the book as you like, you keep it clean.A. unlessB. so longC. as longD. so lo

发布时间：2020-08-16 11:01:12

You may use the book as you like,      you keep it clean.
A. unless
B. so long
C. as long
D. so long as

网友回答

A. unless
B. so long
C. as long
(答案→)D. so long as
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