I’m not a teacher in this school．I until a new teacher arrives．
A. am just helping out
B. could just help out
C. just help out
D. have just helped out
网友回答
(答案→)A. am just helping out
B. could just help out
C. just help out
D. have just helped out
解析：考查时态。句意：我不是这个学校的老师。我现在只是在这里帮忙直到一个新老师来。根据句意说明现在我只是在这里帮忙，故使用现在进行时。故A正确。