It is the bus driver who should the safety of the passengers.
A. answer for
B. search for
C. stand for
D. go for
网友回答
A. answer for
B. search for
C. stand for
(答案→)D. go for
解析：句意为：公交车司机应该为乘客的安全负责。answer for 对---负责；search for寻找，搜索；stand for 代表，象征；go for主张，拥护。