my sister three times today but her line was always busy.A. I’d phonedB. I’ve been phon

问题补充：

my sister three times today but her line was always busy.

A. I’d phoned

B. I’ve been phoning

C. I’ve phoned

D. I was phoning

答案：

A. I’d phoned

B. I’ve been phoning

(答案→)C. I’ve phoned

D. I was phoning

解析：全句意思为“今天我给姐姐打了三次电话，但是她的电话总是占线”。首先依据时间状语today，排除A、D两项；现在完成进行时多表示持续不断的动作，用在此处不妥。故选C项。