2. 考研
  3. ______no gravity, there would be no air around the earth, hence no life.

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

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问题 ______no gravity, there would be no air around the earth, hence no life.
选项 A、If there was
B、If there had been
C、Were there
D、Had there been
答案C
解析
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