we consider____the machine should be adjusted each time it is usedA.that it necessary B.necessary it that 选什么?为什么?B选项错了,应该是it necessary that 对不起哦

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we consider____the machine should be adjusted each time it is usedA.that it necessary B.necessary it that 选什么?为什么?B选项错了,应该是it necessary that 对不起哦
we consider____the machine should be adjusted each time it is used
A.that it necessary B.necessary it that
选什么?为什么?
B选项错了,应该是it necessary that 对不起哦

we consider____the machine should be adjusted each time it is usedA.that it necessary B.necessary it that 选什么?为什么?B选项错了,应该是it necessary that 对不起哦
B,it引导的that 同位语从句 it = that the machine should be adjusted each time it is used.

选A,consider后加从句,用that引导,it necessary that the machine should be adjusted each time it is used,consider that是固定句型