— It is unwise for some people to drive and talk on a cell phone.—. It’s very dangerous.A

问题补充：

— It is unwise for some people to drive and talk on a cell phone.

—. It’s very dangerous.

A. I couldn’t agree more

B. Not really

C. Good idea

D. That’s great

答案：

(答案→)A. I couldn’t agree more

B. Not really

C. Good idea

D. That’s great

解析：A. I couldn’t agree more再同意不过了，B. Not really不是真的，C. Good idea好主意，D. That’s great很好，句意：--一些人开车打手机是不明智的。--完全同意。这样做很危险。所以选A。