______?-I got know her in2007.A:When did you get to know her?B:How long have known her?

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______?-Igotknowherin2007.A:Whendidyougettoknowher?B:Howlonghaveknownher?______?-Igotknowherin2007.A

______?-I got know her in2007.A:When did you get to know her?B:How long have known her?
______?-I got know her in2007.A:When did you get to know her?B:How long have known her?

______?-I got know her in2007.A:When did you get to know her?B:How long have known her?
选a,根据答案in 2007可以知道表示的是具体时间,而不是一个时间段,所以要用when开头提问的疑问句
how long开头的问句的回答一般是时间段,如3 years.