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This machine I have been looking after for 20 years, is still working perfectly.

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This machine I have been looking after for 20 years, is still working perfectly.

This machine ________ I have been looking after for 20 years, is still working perfectly.

A.that

B.which

C.for that

D.at which

试题答案

B

标签：forafteryearslookingmachine

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