问题

The disabled man has trouble _______common things like carrying things.

A:When we found a big fire nearby, we should call 110 for help.
B:When there is a thief who is stealing things in the shop, we can call the police on 114.
C:When a car crashed into a tree in the evening, we need to call 120.
D:When a man suddenly felt very sick, we need to call 119 at once;
正确答案是: