中文谷Wehavebeenskating
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问题详情：
We have been skating ________ two yeas ago.
A. since C. in D. before
【回答】
A
知识点：介词和介词短语
题型：选择题
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问题详情：
We have been skating ________ two yeas ago.
A. since C. in D. before
【回答】
A
知识点：介词和介词短语
题型：选择题
