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

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

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。

就是这个解释

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