问题补充：
--- 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
答案：
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： 考查宾语从句。应用陈述句语序，可排除A、C两项，在根据答语大约两周，可知问的是多长时间，故用how long提问，所以选D。
