At the crossroads you have to drive very to avoid traffic accidents.A. quicklyB. cautiou

问题补充：

At the crossroads, you have to drive very to avoid traffic accidents.

A. quickly

B. cautiously

C. curiously

D. perfectly

答案：

A. quickly

(答案→)B. cautiously

C. curiously

D. perfectly

解析：副词辨析。A迅速地B谨慎地；C好奇地；D完美地；句意：在十字路口，你不得不很谨慎地开车以避免遇见交通堵塞。根据句意说明B正确。