---Could you tell us ?
---About two weeks.
A. how often are we going to be away
B. how often we are going to be away
C. how long are we going to be away
D. how long we are going to be away
网友回答
A. how often are we going to be away
B. how often we are going to be away
C. how long are we going to be away
(答案→)D. how long we are going to be away
解析：本题问句tell后跟的是一个宾语从句用正常的陈述句顺序，故不选AC，本题回答语表示的是时间长度，对此提问用how long，故本题选D。