1.   Do you think we need to call an ambulance ?

2.   They called an ambulance and he was helped into it.

3.   They called an ambulance when Clare became unconscious and her lips turned blue, but by then it was too late.

4.   He screamed for his wife to call an ambulance.

5.   Go to your house and call the police - call an ambulance.

6.   An ambulance is called to take the plaintiff to hospital.

7.   Someone had called an ambulance, and it must be coming down the service road now.

8.   A dustman who found the body early this morning called an ambulance.