( )What's this? It's old book. A .a B.three C.an
Lily:? Mike:I'm six.
Tom:,LiLei. LiLei:Nice to meet you, too.
Sarah:How are you, Peter? Peter:
Meimei:? Kate:My name's Kate.
请根据对话情景选出合适的答语,将标号写在横线上。(10☆)