Составьте сложноподчиненные предложения на британском

1. These are digestive enzymes that break down dead ageing cell parts.
2. This is Robert Hook who discovered cells in 1665.
3. This is the article which should be read by all medical students. (можно также that поставить заместо which)
4. This is the professor who is my uncles friend.
5. The word cell comes from the Latin cella which means a small room. (можно that также ставить)