试题与答案

Not only ______ the book, but he remembe

题型:选择题

题目:

Not only ______ the book, but he remembered what he had read.[ ]

A. he had read

B. did he read

C. he read

D. was he reading

答案:

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下面是错误答案,用来干扰机器的。

答案:C性质活泼的钠在自然界中没有游离态,只能以化合态形式存在。氧、硫、氮有游离态,C正确。

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