Make one sentence from two, using the best Relative clause

I. Make one sentence from two , using the best Relative clause.
1. John found the cat. Its leg was broken.
- John
2. Mr Brown is a vẻy nice teacher. We studied English with him.
- Mr
3. The architect desgined these flats. He has moved to HCM City.
- The
II. Combine the following sentences, using Preposition + Whom or Which
1. Daisy has three brothers. All of them are teachers.

2. The house is for sale. I was born in it.

III. Reduce the Relative Clause for each sentence:
1. Most students who were punished last week are lazy.

2. Fans who want to buy tickets started queuing early.