They’re playing____.（  ）

A．ping-pong

B．the ping-pong

C．the ping-pong ball

Tomorrow we are going to ________the Christmas tree. (   )

A．put about

B．put off

C．put up

Look _________ the red water. (    )

A．on

B．at

C．of

Choose and fill.（选词填空）
(Whose, longer, runs, Who, better, good)
1. Who sings _________ than Tim?
2. Are you ______ at it?
3. _________ ruler is long?
4. Whose hair is ____________ than Lily’s?
5. Amy ____________ faster than Lily.
6. _________ is shorter than Lily?

I’m very interested_____art. ( )

A．in

B．at

C．on