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Not once since my son went to school———— traveling with him.

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Not once since my son went to school———— traveling with him.
A had I gone B have I gone C I have gone D I had gone
选B 为什么
Not once since my son went to school———— traveling with him.
我儿子上学以后,我就从来没有和他一起旅行过.
选B,have I gone
用have而不是had,是因为这里说的事一直延续到现在,而不是过去某个时间点.
有倒装的形式(have I),是因为Not这个否定词放在了句首,按语法规则必须使用倒装.