— When did you become a volunteer? — Two
题型:选择题
问题:
— When did you become a volunteer?
— Two years ago. I _____ this group since then. [ ]
A. joined
B. have joined
C. have been in
— When did you become a volunteer?
— Two years ago. I _____ this group since then. [ ]
A. joined
B. have joined
C. have been in