------How ______is your father?

------He is 40.

A．big              B．old               C．long              D．much

1.—How long __________ your father________ (work) in the factory?

—Since he ___________ (leave) college.

2. How long __________ you __________ (listen) to music last night?

3. When ____________you ________ (attend) the after-school club?

4. He is always the first one _______ (arrive) at school and the last ______ (leave) school.

5. We _______ (be) friends for the whole ten years.

6. _________ (collect) old coins is my father’s hobby.

7. My father had me ______ (clean) my bike, but I had it ________ (clean) in the shop.

----______ your father?

----He's forty.

[    ]

　　A. How old is   B. How old are   C. How is   D. How many is