题目内容
【题目】There _______a big river in front of the house but now it has turned into farmlands.
A. used to have B. used to be C. is used to having D. is used to be
【答案】B
【解析】句意：过去在这座房子前有一条大河，但是现在它变成了农田。There be结构，排除B/C；used to do sth 过去常常做某事； be used to do sth被用来做某事，故选B
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