问题
选择题
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
答案：D
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。
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