问题描述：
1.We should keep our reading room___.
A.quietly B.quiet c.silent D.silently
选D,为什么不可以选c?
2.The goverment should stop factories_____producing unhealthy gases.
A.by B.in C.with D.from
选D,为什么?
A.quietly B.quiet c.silent D.silently
选D,为什么不可以选c?
2.The goverment should stop factories_____producing unhealthy gases.
A.by B.in C.with D.from
选D,为什么?
问题解答：
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