He was so thought that he didn’t see the pole on the road
A. buried in
B. careful with
C. busy with
D. serious about
网友回答
(答案→)A. buried in
B. careful with
C. busy with
D. serious about
解析：考查词组辨析：A.be buried in 埋头于B.be careful with对…细心C.be busy with忙于，D.be serious about对…认真，句意：他在专注的思考，没有注意到街上的杆子。选A。