Mary and I have been close friends ______ we met each other 10 years ago.A．whenB
题型：不详难度：来源：
| Mary and I have been close friends ______ we met each other 10 years ago. |
答案
| B |
解析
试题分析：考查连词：A. when当…时候B. since自从C. until直到. As因为，句意：玛丽和我自从10年前认识，一直是好朋友。选B。
点评：连词的辨析要放在上下文去进行，同时要注意一些形式相近的连词的词义辨析。Since的用法还可以从时态判断。 |
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