__no gravity,there would be no air around the earth.A;If there was B;Were there咋选呀?

__no gravity,there would be no air around the earth.A;If there was B;Were there咋选呀?

题目
__no gravity,there would be no air around the earth.A;If there was B;Were there咋选呀?
答案
B
Were there
或者if there were
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