看图，补全对话。
【小题1】
—What _________ _________ doing?
—We are _________ _________.
【小题2】
—What is he doing?
—He is doing the _________ _________.
【小题3】
—Are you playing volleyball?
—________, we __________.
【小题4】
—What are they doing?
—They are ________ the _________.
【小题5】
—Are they playing badminton?
—_________, they _________.

I am flying in the sky. My mum is _______ to say goodbye. （ ）

A．wave

B．waving

C．waveing

He is ______ his homework. (   )

A．write

B．writting

C．writing

He’s __________________ an e-mail. (   )

A．writing

B．write

C．written

Peter is ______ green shorts. (   )

A．wear

B．wearing