We consider______the instrument should be adjusted each time it is used.

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问题 We consider______the instrument should be adjusted each time it is used.

选项 A、that it necessary
B、necessary that
C、it necessary that
D、necessary of it that

答案C

解析我们认为有必要每次使用该设备时都要加以调试。考点：非指代性it的用法。本句中it为形式宾语，真正的宾语是后面that引导的宾语从句，这样是为了句式结构的平衡。

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英语

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