问题
选择题
—When ____your sister the computer? —Last month.
A. does, buys B. did, buy C. did, buys
答案
答案：B
从答语Last month.上个月来看，前面问句应是过去时态，一般现在时态，第三人称动词后面加s，所以选B.
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—When ____your sister the computer? —Last month.
A. does, buys B. did, buy C. did, buys
答案：B
从答语Last month.上个月来看，前面问句应是过去时态，一般现在时态，第三人称动词后面加s，所以选B.