为什么选D ___no gravity,there would be no air around the eartha
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为什么选D
___no gravity,there would be no air around the earth
a if there was
b was there
c if there had been
d were there
___no gravity,there would be no air around the earth
a if there was
b was there
c if there had been
d were there
此题考察虚拟语气的用法.因为不可能没有重力,所以用虚拟语气.现在虚拟语气be动词一律用were,所以a b错误,c 应为if there were,if there had been 为对过去虚拟也不对.were there为if there were的省略倒装形式,故选d 具体虚拟语气的用法可以参考语法书.
为什么选D ___no gravity,there would be no air around the eartha
__no gravity,there would be no air around the earth.A;If the
There was no air or water,there would be no life in the worl
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( )no air or water,there would be no life in the world
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