He could be running _______exercise．

A．with         B．for         C．to          D．in

选出相对应的答语

1．Why do you think the man is running? (　　)

2．Who is the woman with a book? (　　)

3．Whose is the pen? (　　)

4．Whose guitar is this? (　　)

5．Is this your volleyball? (　　)

A．She must be Mrs Green. (　　)

B．It might belong to Alice. She plays the guitar.

C．Yes, it is.

D．It may be MiMi's.

E．He could be running for exercise.