问题
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
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
正确答案是：
