Sure! Here are the correct answers circled for Exercise 5 and completed for Exercise 6:

**Exercise 5: Circle the correct answers.**
1. My book is **(as)** interesting as yours.
2. His house is different **(from)** my house.
3. No other writer in English **(is)** as famous as Shakespeare.
4. No other metal is as **(useful)** as iron.
5. Your hat **(looks)** the same as Mary’s.

**Exercise 6. Complete the sentences by using “as... as”; “not as... as”; “different... from”.**
1. Learning French is **not as difficult as** learning English.
2. These trees are **the same as** those.
3. Vios is **not as luxurious as** Mazda 3.
4. His appearance is **different from** what I have expected.
5. His job is **as important as** mine.

Feel free to ask if you have any more questions!