is clear to us all, students should obey the school’s rules.A. AsB. WhatC. WhichD. It

发布时间：2020-08-17 14:24:53

     is clear to us all, students should obey the school’s rules.
A. As
B. What
C. Which
D. It

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(答案→)A. As
B. What
C. Which
D. It
解析：在非限制性定语从句中，As代替后面出现的整个概念。
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