用括号内动词的适当形式填空。

1. Mrs. Green often          (walk) in the park after dinner.

    Look! She         (walk) in it today.  

2. —         Mike usually ____ (write) to you?   

    —Yes, he         . I         (read) his letter now.  

3. My brother          (have) some CDs.  

4. Who         (dance) under the big tree at the moment?    

5. Our English teacher          (be,not) in his office.    

    He         (give)a lesson in the classroom