6. That man has never been known before.
7. The room was filled with smoke.
8. It's hard to understand his pronunciation.
9. We were careful to do the English test.
10. She was ashamed so she didn't tell the truth.
XIII. Rewrite each of the sentences so that the meaning stays the same.
1. That book has not been opened for the last hundred years.
2. Milk is used for making butter and cheese.
3. The long dresses used to be worn by these women.
4. Tortoise is said to live longer than elephants.
5. I was made to do it.
