______no gravity, there would be no air around the earth.

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问题 ______no gravity, there would be no air around the earth.

选项 A、Were there
B、There were
C、Was there
D、There be

答案A

解析 本题考查的是省略了if的非真实条件句中虚拟语气的用法,这种情况下要用倒装结构,即正常语序:If there were no gravity,there would be no air around the earth变化为:Were there no gravity,there would be no air around the earth.条件句中用were而不用was。
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