Tom： you OK，Sam?
Sam：No，I'm not. It's Monday and I have history.
Tom：You like history?
Sam：No，it's boring.
Tom：So your favorite subject?
Sam：Oh，I like music best. I often go to the music club(俱乐部)．
Tom：When do you have ?
Sam：On ，the third day of the week. Do you like music?
Tom：Yes，very much.
