____ no doubt among the students that water isn't enough for all the people in theworld.A. There has had B.They have C. It exist D.There exists
问题描述：
____ no doubt among the students that water isn't enough for all the people in the
world.
A. There has had B.They have C. It exist D.There exists
答
D
There be 的变体，be 可以用live stand ,exist 等代替。
答
A. There has had 现在完成时表示于现在有关
毫无疑问。。。。
答
D
这是There is no doubt that.句型,意即“毫无疑问.”
此句用了表存在概念的exists 代替了be 动词 is
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