---How long you the bicycle?-About two weeks.A. have hadB. have boughtC. did buyD.

问题补充：

---How long you the bicycle? ---About two weeks.

A. have, had

B. have, bought

C. did, buy

D. have, get

答案：

(答案→)A. have, had

B. have, bought

C. did, buy

D. have, get

解析：句意：你买了这辆自行车多久了？——大约两个星期。结合语境可知上文描述的是一只持续到现在的动作，故用现在完成时态。Buy表示瞬间动作，不能和表示一段时间的时间状语连用，故选A。