问题补充：
— Could you tell us ? —For about two weeks.
A. how soon you will be back
B. how long you will be there
C. how soon are you going to be back
D. how long are you going to be away
答案：
A. how soon you will be back
(答案→)B. how long you will be there
C. how soon are you going to be back
D. how long are you going to be away
解析：根据回答，达大约两周。故引导词应该是how long,多久。宾语从句，应该用陈述句语序，故选B。
