Rewrite the following sentences so that they have the same meaning as the original ones.
1. Green trees were planted around their house.
2. Lan wishes she had a sister.
3. Ba asked where the ticket office was.
4. To visit Thailand, you need to have a visa.
5. Because Bill’s typewriter had broken, he had to use a pencil.
6. A new bridge will be built in the city.
7. I asked Tam if he wanted to visit the Great Wall in China.
8. I wish I could understand this problem.
9. Because, I don’t have enough money, I can’t buy that dictionary.
10. My father is the first person whose advice I usually ask for.