The computer looks old, but it _________ just half a year ago.
A．has been boughtB．will be boughtC．is bought D．was bought
D
考查動詞時態(tài)。本題容易錯選A項。語境有具體過去時間“half a year ago”，因此buy表示過去的動作，用一般過去時被動語態(tài)。
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