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Thismachine,

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问题详情:

Thismachine,

This machine, ______for many years, is still working perfectly.

A. after which I have looked         B. which I have looked after

C. that I have looked after           D. I have looked after

【回答】

B. which I have looked after 构成一个非限制*定语从句.

知识点:定语从句

题型:选择题

标签:Thismachine