When the cheering the president continued his speech.A. died offB. died downC. died out

问题补充：

When the cheering , the president continued his speech.

A. died off

B. died down

C. died out

D. died of

答案：

A. died off

(答案→)B. died down

C. died out

D. died of

解析：短语辨析，A先后死亡；B逐渐变弱；C灭绝；D死于（疾病）句意：当欢呼声逐渐减弱的时候，总统继续他的演讲。故B正确。