动动脑。（选择相应的答语，只填序号）
(     ) （1）What’s this?
(     ) （2）What are those?
(     ) （3）What are they doing?
(     ) （4）What are these?
(     ) （5）Where are you from?

A．They’re flowers.

B．These are birds.

C．I come from Yunnan.

D．This is a boat.

E.They are singing.