问题描述：
完成句子,
10 - 离问题结束还有 17 天 23 小时
A man stood at the door,not knowing_________ (不能决定是进去还是离开)
We must_____________________(阻止废水污染河流)
顺便问下.
This is the only idea _________ right.
A.which they think is B.that they think is
C.that they think it is D.which they think it is
10 - 离问题结束还有 17 天 23 小时
A man stood at the door,not knowing_________ (不能决定是进去还是离开)
We must_____________________(阻止废水污染河流)
顺便问下.
This is the only idea _________ right.
A.which they think is B.that they think is
C.that they think it is D.which they think it is
问题解答：
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