高等继续教育 / 大学英语语法
正确率：100%
题型描述: 单选题
＿＿＿＿＿＿ plenty of water in this river.
A.There used to be
B.There is used to being
C.There was used to be
D.There used to being
＿＿＿＿＿＿ plenty of water in this river.
A.There used to be
B.There is used to being
C.There was used to be
D.There used to being
参考答案：
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