Change the sentences into the passive form:
1. Three continents surround the Mediterranean Sea.
2. Machine scores the examination papers.
3. His father praises him when he works hard.
4. Do you rarely clean the board?
5.I advise my sister to put her money box under the carpet.
6. How many ways do you solve this problem?
7. He never gives the magazine back to me.
8. The postman usually leaves letters in the hall.
9. You wear this shirt because it is very nice.
10. The government lauch an anti- smuggling campaign.