—What are you _______? (   ) 
—I’m eating an apple.

A．doing

B．do

C．does

用所给单词的正确形式填空。
【小题1】The baby _______ (cry) now.
【小题2】I would like _______ (orange) .
【小题3】The man behind _______ (I) is talking.
【小题4】The _______ (boy) and _______ (girl) are singing and dancing.
【小题5】The people on the train are _______ (have) fun.
【小题6】He is _______ (eat) an apple.
【小题7】We often _______ (have) breakfast at 7 in the morning.
【小题8】They _______ (be not) doing their homework.

Look! My cousin ______ an interesting book. （   ）

A．reading

B．is reading

C．read

She's _________ her dirty feet. (    )

A．is washing

B．wash

C．washing

Everyone ____ to their teacher in the classroom. （ ）

A．are listening

B．is listening

C．listen