—I joined the League ________ May, 2009. What about you?
—I've been a League member _______ three years. [ ]
A. in; for
B. on; in
C. on; for
D. in; since
答案:A
—I joined the League ________ May, 2009. What about you?
—I've been a League member _______ three years. [ ]
A. in; for
B. on; in
C. on; for
D. in; since
答案:A