这次迟到的借口是什么？为什么其他人不相信了

 
A: Sorry, I didn't mean to be late. Can I come in?
 
抱歉，我不是故意迟到的。我能进来吗？
 
B: What's your excuse this time?
 
你这次的借口是什么？
 
A: Have I used the one that my sister is sick?
 
我说过我妹妹生病这个理由了吗？
 
B: Yes, twice last week.
 
是的，你上周说过两次了。
 
A: Are you sure? I thought I said it was my mother.
 
您肯定吗？我觉得我说的是我妈妈生病了。
 
B: I don't think so. But it could've been.
 
我可不这么认为，不过也许是吧。
 
A: Well, you can trust me this time. My sister is definitely sick. I'm just coming from the hospital. They said she might even die.
 
这次您可以相信我，我妹妹真的病了。我刚从医院回来，他们说她有生命危险。
 
B: I don't buy your story. Try not to have any more sick relatives this week, all right?
 
我才不相信你的鬼话呢，这周尽量不要再有其他的亲戚生病了好吗？
 
A: I'll do my best.
 
我尽力吧。
 
B: Just try to be a little more punctual in the future.
 
以后要准时点儿。
 
A: I'm working on it. Really.
 
我正在努力呢，真的。