It’s too noisy here. Please ask him to the radio a little.A. turn downB. fall downC. shut

问题补充：

It’s too noisy here. Please ask him to the radio a little.

A. turn down

B. fall down

C. shut down

D. come down

答案：

(答案→)A. turn down

B. fall down

C. shut down

D. come down

解析：词义辨析。turn down关小，调低；fall down跌倒；shut down完全关闭；come down下来，下落。句意：这太吵了。让他把他的收音机关小一点。所以选A。