作业帮Jack ,I haven't seen your brother for a long time.---He __Shanghai on business for two months.A has gone to B has been to C has been in ,A 和B 为什么不对，
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Jack ,I haven't seen your brother for a long time.---He __Shanghai on business for two months.A has gone to B has been to C has been in ,A 和B 为什么不对，
Jack ,I haven't seen your brother for a long time.---He __Shanghai on business for two months.
A has gone to B has been to C has been in ,A 和B 为什么不对，
Jack ,I haven't seen your brother for a long time.---He __Shanghai on business for two months.A has gone to B has been to C has been in ,A 和B 为什么不对，
意思是:他已经在上海做了两个月的生意了.
这里应该填的是"has been in".
A中表示"去哪个地方"这个动作,是非延续性的.
B中一般不用,因为语法有问题.
Jack ,I haven't seen your brother for a long time.---He has been in__Shanghai on business for two months.
意思是:他已经在上海做了两个月的生意了.