i want to know___there A.how long she has been B.how long she has gone 选哪个?

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i want to know___there A.how long she has been B.how long she has gone 选哪个?

i want to know___there A.how long she has been B.how long she has gone 选哪个?
i want to know___there A.how long she has been B.how long she has gone 选哪个?

i want to know___there A.how long she has been B.how long she has gone 选哪个?
A 是对的.
how long 对时间段提问,必须和延续性动词连用.
has gone 是短暂性动词,不能和 how long 连用.

I want to know___there
A.how long she has been B.how long she has gone
选A