I. 1. difference

   2. to visit

   3. his

   4. came up with

   5. excited

II. 1. give out

    2. put off

    3. put up

    4. gave away

    5. Put them away

    6. showing off

III. 1. takes after

     2. fix; up

     3. to talk

     4. to set

     5. alone; lonely

     6. could; visit; cheer them up

IV. One possible version:

Dear Sandy,

Last Saturday, our class went to the Special Education School to have a volunteer activity. The school was very clean and tidy. The students there were blind and deaf. It was very difficult for them to speak. They couldn’t follow their teachers, but the teachers there were very patient. The students wrote very carefully.

The students were very friendly. We played games together. We also learned paper cutting. We gave books, snacks, pens, pencils and toys to them.

All of us were happy and got such a strong feeling of satisfaction because we did something good to others. In my opinion, we should spend more time helping the people in need.

Do you have anything special to tell me? I’m looking forward to your reply.

Yours, 

Li Hua