用所给动词的适当形式填空。
1. The little boy wants _________(eat) a big apple now. So please_______ (bring) one to him. 
2. Tom often_________(go) to school at 7:00. Now, he________   (take) a taxi.
3. --- ______She_____( write) to her friends on Sundays?
---Yes, now she________  (write) a letter now.  
4. ---Where _______Mr. Black usually_________(run)?
---In the park. Now, he__________ (run) in the neighborhood.

Look! The children _____ in the playground happily. （   ）

A．play

B．is playing

C．are playing

Write (T) or (F), and correct on the line: What do they doing now? _____________

What _____you  doing ? (    )

A．do

B．is

C．are

He is ____fast. （  ）

A．running

B．runing

C．run