问题 选择题
I’m sorry        written you a letter at the tine.
A. to have not
B. to not have
C. not to have
D. not having
答案

答案:C

考查不定式的完成时。句意“对不起那时没给你写信。”sorry后跟动词不定式,排除D;不定式的否定是在to前加not,排除A、B。故选C。

单项选择题 A1/A2型题
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