请将下列句子改为一般疑问句，每空一词。 1. Li Ming can go to Canada. Li Ming to Canada? 2. I want to invite my friend to China. Want to invite friend to China? 3. You may sleep in this bedroom. in this bedroom? 4. He arrived in Beijing on Saturday. he in Beijing on Saturday? 5. There are some trees in the picture. trees in the picture? 6. I'd like three donuts. three donuts? 7. The bike is about two hundred yuan. the bike about two hundred yuan? 8. My parents will arrive here in two days. Parents arrive here in two days? 9. I need some money to go to school. Need money to go to school? 10. The little girl is sleeping. the little girl ? 11. I come from the U.S. from the U.S? 12. They can speak Chinese well. Chinese well? 13. We walked to the bus station. to the bus station? 14. Danny wants to buy a pair of cocks for himself. Danny a pair of socks for himself? 15. My camera was good. Camera good?