I. 1. Wednesday

   2. to

   3. at; on

   4. as

   5. sure 

II. 1. What makes him happy?

    2. Whose bike is over there?

    3. What do you usually drink before dinner?

    4. Whose umbrella is this?

    5. Where does she live?

    6. How do you go to school every day?

III. 1. Mrs. Green’s sons

     2. a photo of Bill’s family

     3. Lily and Lucy’s

     4. the twins’

IV. One possible version:

Dear Ben,

You want to know what my favorite sport is. Now I tell you. My favorite sport is basketball. Playing basketball can make me stronger and stronger. And playing basketball is not only very interesting but also helps me make many friends. Sport makes me fun and cool. 

I often play basketball with my friends. Kobe Bryant who is an NBA player is very powerful. He is regarded as the best player in American basketball world. I hope I can have a chance to see an NBA game in person. I wish I can play basketball with Kobe Bryant one day.

Yours,

Li Hua