A driver should the road when .
A. concentrate on; drive
B. concentrate in; driving
C. concentrate to; drove
D. concentrate on; driving
网友回答
A. concentrate on; drive
B. concentrate in; driving
C. concentrate to; drove
(答案→)D. concentrate on; driving
解析：考查短语及非谓语动词。concentrate on集中，句中逻辑主语driver，与drive之间为主动关系，故用现在分词，选D。