A-A+
______ is well-known the environment in China
问题详情
______ is well-known, the environment in China is badly in need of improvement.
A．It
B．That
C．As
D．What
参考答案
正确答案：C
解析：此题考查的是as引导的特殊定语从句。As is well known/As is known to all/As we all know众所周知。
