1.You see a car hit a bike;you want to ask the policeman for help.You can call (A:110 ).
2.You want to telephone XiErdun Hotel to book a room.But you don't know
their telephone.You can call ( D:114 )for help.
3.The house you live is on fire.You can call ( B:119 ).
4.You want to the zoo next day.But you don't know the weather.Then you
call ( C:121 ).