问题补充：
— Could you tell us ? —About two weeks.
A. how often are you 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 you 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：英语宾语从句中一般为陈述语序。How often多久一次；how long多长。根据下文，大约两周。可知上文问的是时间长短，故选D，你能告诉我们我们要离开多久吗？
