（题文）_____ ——I’m playing basketball. ( )

A．What’s you do?

B．What are you doing?

C．What do you do?

D．What are you do?

Betty is ______ a word puzzle. (    )

A．solving

B．solve

C．working

用所给词的适当形式填空。
【小题1】They _________ (spend) their holiday in London last month.
【小题2】Kitty enjoyed _________ (her) at Tom’s birthday party.
【小题3】Lucy is _________ (write) a postcard now.
【小题4】I am _________ (have) a good time in Guangzhou. I _________ (come) here by plane last week.
【小题5】Joe is good at ____________ (climb) mountains. He wants to climb Mount Tai.

— What are you doing, Mike? （ ）
— I’m _____ a story book.

A．read

B．reads

C．reading

D．to read

The dog _______. (   )

A．barking

B．is barking

C．bark