那是一个书包吗?不,它不是。应该说: A. Is that a schoolbag? No, it isn’t.B. Is this a schoolbag? No, it isn’t.C. Is that a schoolbag? Yes, it is.
-ls Kate in? -No, she isn't. She is out.
This is Tom's picture. That is mine.
-Thanks a lot. -That's all right.
We do some shopping on Saturday.
Nice to meet you.