问题补充：
--- How long has your brotherthe computer?
--- About two weeks.
A. bought
B. had
C. received
D. borrowed
答案：
A. bought
(答案→)B. had
C. received
D. borrowed
解析：句意：--你的兄弟买这台电脑已经多长时间了？--大约两个星期。分析how long为段时间，因此不能用买、收到、借这些瞬间动词，而要用延续性动词，结合句意用买，在与段时间连用时用have转换。故选 B
