问题
It’s clever _____you to help me work out the difficult math problem. Thanks!— You are welcome. Now it’s easier _______you to understand it.
A:used to live；is used to living
B:used to living；is used to living
C:used to live；is used to live
D:used to living；is used to live;
B:used to living；is used to living
C:used to live；is used to live
D:used to living；is used to live;
正确答案是：
同类题型
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