Buses have routes. They and people at different places on the routes.A. take on get off

问题补充：

Buses have routes. They and people at different places on the routes.

A. take on, get off

B. pick up, drop off

C. take up; take off

D. pick out; drop out

答案：

A. take on, get off

(答案→)B. pick up, drop off

C. take up; take off

D. pick out; drop out

解析：考查短语辨析。pick up上车；drop off下车。句意：公共汽车都有固定的线路，人们可以在其线路上的各停车点上下车。