听音，根据你所听到的句子，选择合适的答语。(15分)
(1)A.It's a dog.             B．Are they cows?       C．They are cows.
(2)A.Eight.                  B．White.              C．Donkey.
(3)A.Yes, they are.          B．No, it isn't.       C．Yes, it is.
(4)A.Five.                  B．Five yuan.           C．Five o'clock.
(5)A.It's time for lunch.
B．It's time for English class.
C．It's ten o'clock.