Question

where have you been traveling recently?

－Where have you been recently?
－I _______ in Hangzhou on business for a week last month.
A．have been
B．was
C．had been
D．had gone
为什么选B不选C

Answer 1

for a week给你造成一种错觉是完成时态,其实不是的.
过去完成时态的定义是：截止过去某个时间点完成的动作或者事情.
而表示一个人在哪个地方,用一般时态就可以了,由于是last mouth所以用一般过去式 was
这话用中文说是 上个月我一个星期在杭州做生意
选A是更不对的咯.