Question

How long have you ________ this bike?

I bought it 2 years ago.
A. bought B. had C. keep D. borrowed

Answer 1

这里需要一个延续性动词，而且需要过去分词，所以ACD排除

选择B

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Answer 2

选B
how long 是对时间段进行提问的，要和延续性动词连用，buy就要改成have，have的过去分词为had

Answer 3

选B，这里应该用延续性动词，buy,borrow都是短暂性动词，
keep时态错了应该是kept

Answer 4

A. bought

Answer 5

How long have you ________ this bike?
I bought it 2 years ago.
A. bought B. had C. keep D. borrowed
选B