用词的适当形式填空。
【小题1】Asia has the ________(large) population.
【小题2】Africa is the _______ (hot) continent in the world.
【小题3】There was a little note. It _____ (say), “Thank you.”
【小题4】Santa Claus is_______ (finish) his travels around the world.
【小题5】There are all ______ (kind) of cakes in the restaurant.

Helen is ____________(listen/ listening) to music.

---What are they doing?
---They're the paper.

A．cut

B．cutting

C．cuting

Look!They are ______under a big tree. （   ）

A．sitting

B．sits

C．sit

Mum is________ eggs in the kitchen. （  ）

A．cook

B．cooking

C．cooks