教育/科学 -> 外语学习 ->
问题描述：
教育/科学 -> 外语学习 ->
I __ the USA for about two years
A.have been to B.have gone to C.have been in D.have been
-We are going to have a four-day holiday
-____ go to Hangzhou for holiday.
A.How about B.What about C.Shall we D.How do we
答
C 由for可知是一段时间,用have been in
C .How about 和What about 后加doing,shall表示建议的意思