问题
选择题
---Could you tell me _____?
---About two months.
A．when are you leaving for Shanghai
B．how often you go to the school library
C．how many tickets have you booked
D．how long you have been at this school
答案
答案：D
根据About two months，大约两个月，可知是询问时间长度，所以用how long提问。选D。