A、A week ago. B、Nearly twenty days ago. C、A couple of weekdays. D、Several days ago. CWhen was Keith chased by bulls?

W: Have you ever been chased by a dog, Keith?
M: No, I haven’t, it’s not a dog, but I have been chased by bulls.
W: Really? You have been chased by a bull?
M: Yes, it was a couple of weeks ago, I was...er...I was going for a walk out in the country following this footpath and it went through a field, and I was so busy looking out for the footpath that I didn’t notice that the field was full of young bullocks. And the trouble was I was wearing this bright red anorak, and suddenly the bulls started bucking and jumping up and down and started chasing me.
W: What did you do?
M: Well, I was pretty scared, I just ran for the nearest fence and jumped over it.
W: Actually I do know somebody who once got bitten by a dog while he was jogging.
M: Was he? How did that happen? You know, it’s kind of hard to believe things like this.
W: Well, he was running past a farm when suddenly this sheepdog came out and started barking at him, so he tried to kick it out of the way, but then suddenly the dog jumped up and bit him in the leg. I think he had to go to the doctor to make sure it wasn’t infected. You know it is really very dangerous.