1. The professor told the students the answers to the questions.
\( \rightarrow \) The students were told the answers to the questions by the professor.
2. "Are you teaching at a Secondary school now?" Mr. Lam said to me
\( \rightarrow \) Mr. Lam asked me if I was teaching at a Secondary school then.
3. Keep fit or you can't try mountain climbing.
\( \rightarrow \) If you don't keep fit, you won't be able to try mountain climbing.
4. The last time my best friend attended my birthday party was three years ago.
\( \rightarrow \) My best friend hasn't attended my birthday party for three years.
5. They are more brave fighters than they were.
\( \rightarrow \) They fight more bravely than they used to.
6. Despite his impolite behavior, everybody still loves him.
\( \rightarrow \) Although he behaves impolitely, everybody still loves him.