问题补充:
--Monitor?
--- I’m not monitor of our class. I with the teacher until the monitor is elected.
A. will just help
B. am just to help
C. am just helping
D. have just helped
答案:
A. will just help
B. am just to help
(答案→)C. am just helping
D. have just helped
解析:考查时态,句意是:--班长?--我不是班长,我只是帮老师忙直到班长选出来。说明帮忙是暂时的,现在进行时可以表示现阶段暂时的动作,选C。