—I called you at 6 oclock yesterday evening but nobody answered.— Im sorry. I my friend

问题补充：

—I called you at 6 oclock yesterday evening, but nobody answered.

— Im sorry. I my friend download the movie Kung Fu PandaⅡwhen the telephone rang,

A. would help B. helped C. was helping

答案：

解析：考查动词时态 上下语境都是过去时，这里强调电话响时我正在帮助，所以用过去进行时。