单选题 The Prime Minister refused to ______ on the rumour that he had planned to resign.
【正确答案】 A
【答案解析】解析：comment(on)vi．对……发表评论。explain vt.解释。说明(句型：explain sth．to sb．；explain to sb．that…)。tell vt．告诉；吩咐，命令；辨别(from)。talk v.讲话，交谈：谈论。