涂于德 发表于 2008-1-22 18:39:44

multiple choice

Although he has lived with us for years, he ___ us much impression. (2004年上海春季卷)
A. hadn’t left
B. didn’t leave
C. doesn’t leave
D. hasn’t left

I’m confused by this problem. I can hardly tell any differences between C and D. Could you do me a favor?
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