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A
that it necessary
B
it necessary that
C
necessary that
D
necessary of it that
正确答案 :B
解析
【精析】B句意:我们认为每次在使用仪器的时候进行调试是非常必要的。名词性从句题。在宾语从句中,尤其是当句子中含有复合宾语时,it可作形式宾语,而真正的宾语that从句则放在句尾。故本题应选B。
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