---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
网友回答
A. will just help
B. am just to help
(答案→)C. am just helping
D. have just helped
解析：句意：---班长吗？---我不是我们班的班长。我只是帮助老师直到选出班长来。表示近期一直在做的事用现在进行时。A.一般将来时；B.表示注定要发生的事；D.现在完成时。故选C。
考点: 考查动词时态的用法。