判断正误。

Liu Tao: Hi, Su Hai. Is this your crayon?

Su Hai: No. This crayon is green. It's Yang Ling's(杨玲的). My crayon is red.

Liu Tao: Yang Ling, is this your crayon?

Yang Ling: Yes, it is. Thank you. What's this?

Liu Tao: It's a pen. It's my birthday present(礼物).

Yang Ling: Your birthday? Are you ten?

Liu Tao: No, I'm eleven.
Yang Ling: Is this new pencil case yours?

Liu Tao: No, it isn't. It's Su Yang's.