问题
选择题
He has worked in the city _______ three years ago while his wife has been here______only one month.
A．since , for
B．since, since
C．for, since
D．for, since
答案
答案：A
题目分析：句意：他自从3年前就在这个城市工作，而他的妻子在这仅仅有一个月。For后面跟时间段，since后面跟时间点。故选A。