A:It's getting dark.
B:Yes, what time is it? I don't have my watch with me.
A:It's ten minutes to five.
B:Perhaps your watch is slow.
A:Oh, it has stopped. I must have forgotten to wind it last night.
B:Let's ask Mary over there. Mary, have you got the time?
C:Yes, it's six twenty.
B:Is your watch right?
C:I think so. I set it by the radio this morning.