题目内容
The city has improved a lot _________ I came here a few years ago.
A. for B. since C. before
B
解析试题分析：句意：自从我几年前来到这里，城市已改善了很多。A. for因为，由于B. since 自从 C. before在……之前。由句意可看出选B。
考点: 考查连词的用法。
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