Have you ever been toShanghai,Mary?Yes,I ___ there for three days with my parents last month.

题目

Have you ever been toShanghai,Mary?Yes,I ___ there for three days with my parents last month.
A.have gone B.have been C.went D.was

答案

D.was
for three days 有段时间,C不行,go是点动词.
last month.上个月,显然是过去时.