The computer looks old but it just half a year ago.A. has been boughtB. will be boughtC.

问题补充：

The computer looks old, but it just half a year ago.

A. has been bought

B. will be bought

C. is bought

D. was bought

答案：

A. has been bought

B. will be bought

C. is bought

(答案→)D. was bought

解析：考查动词时态。本题容易错选A项。语境有具体过去时间“half a year ago”，因此buy表示过去的动作，用一般过去时被动语态。