问题补充:
Lily with her parents Oxfam since two years ago.
A. has joined
B. have joined
C. has been in
D. have been in
答案:
A. has joined
B. have joined
C. has been in
D. have been in
解析:句意:莉莉和她的父母在两年前就已经加入了施乐会。结合语境可知本句描述的是已经持续了两年的动作,故用现在完成时态。with her parents是伴随主语,真正主语是莉莉,故助动词用单数。瞬间动词不能和持续性时间状语连用,选项AC,表示瞬间动作,故选C。