What did they use to have?
他们过去有什么?（表示现在没了）
What did they use to do?
他们过去做什么?（表示现在不做了）
是what did they use to have?还是what did they use to do?
是what did they use to have?还是what did they use to do?
英语人气：945 ℃时间：2019-09-29 14:59:12
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