1. People believe that the island was found by accident.
   The island **is believed to have been found by accident.**

2. The weather was bad, and several cars withdrew from the rally.
   Due to **the bad weather, several cars withdrew from the rally.**

3. He drives so carelessly that he often has accidents.
   He's such **a careless driver that he often has accidents.**

4. Jo's training accident meant she couldn't take part in the race.
   Jo's training accident prevented **her from taking part in the race.**

5. Let's have something to drink now.
   Shall **we have something to drink now?**

6. Mai met an old friend of hers by chance yesterday.
   Mai bumped **into an old friend of hers yesterday.**

7. He can't wait to go on the picnic this weekend.
   He is looking **forward to going on the picnic this weekend.**