听音，选择你所听到的句子。(15分)
(1)A.Can I help you?                 B．Can I try them on?
(2)A.Whose pen is this?              B．Who is that?
(3)A.How many umbrellas are there?    B．How much is the umbrella?
(4)A.It's too small.                 B．It's too big.
(5)A.It is very pretty.              B．It is very cheap.