企源知识库

Many trains were stopping and ________ their passengers.
A、unloading
B、entering
C、delivering
D、waiting
【正确答案】：A
【题目解析】：unload卸载；enter进入；deliver实现；传送；履行；投递；wait等待，常与for连用
句意：许多火车停了下来，把乘客从车上卸下来。