英文 it is necessary that the result of an experiment______
a.be checked and rechecked
b.would be checked
c.should check and recheck
d.is checked and rechecked
人气：320 ℃ 时间：2020-01-27 23:40:55
解答
it is necessary that the result of an experiment______选A这是一句虚拟语气结构是it is +necessary +that +(should)+ do...因为实验的结果是被检查的,所以用被动完整的句子是it is necessary that the result of ...
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