题目内容
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[主观题]
If there （) no air and water, all living creatures would die.
A、is
B、were
C、be
D、been
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A、is
B、were
C、be
D、been
如果结果不匹配，请 联系老师 获取答案
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