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市长在他的电视讲话中详细谈了交通安全问题。他提到自一月份以来,由交通事故造成的死亡人数一直在上升。 [

A、 ] The mayor dwelt at the problem of traffic safety in his TV talk, in which he mentioned the deaths caused by traffic accidents had been on the rise since January. [

B、 ] The mayor dwelt on the problem of traffic safety in his TV talk, which he mentioned the deaths caused by traffic accidents had been on the rise since January. [

C、 ] The mayor dwelt in the problem of traffic safety in his TV talk, he mentioned the deaths caused by traffic accidents had been on the rise since January. [

D、 ] The mayor dwelt on the problem of traffic safety in his TV talk, in which he mentioned the deaths caused by traffic accidents had been on the rise since January.

参考答案