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问题: 状语从句 .

If the sun ______rise tomorrow.what would happen?
A.cannot
B.would not
C.can not
D.does not

解答:

If一般是表示假设,这句话的意思是:如果明天太阳不升起,一切将会怎样?
what would happen,是继前者假设的结果.这里没有虚拟,因为太阳不升起当然有可能啊,所以用一般现在时:D does not.