When my sister phoned me, I could not hear clearly what she was

When my sister phoned me, I could not hear clearly what she was _____.
A、speaking
B、talking
C、saying
D、telling
【正确答案】:C
【题目解析】:Speak说某种语言; talk谈话;say说,强调内容;tell告诉。句意:当我的妹妹给我打电话时,我不能清除听清他在说什么。可知强调的是说的内容,故选C