1. There's nobody at school at the moment.
2. It's very important to keep a habit.
3. When are you leaving for Nanjiang?
4. I didn't go out last night until I finished my homework.
5. Who/Whom are you talking to/with?
6. I hope he will get better tomorrow.
7. He didn't go home until the rain stopped.
8. Don't be angry/mad at the matter. be angry/mad at sth or with sb.
9. What is your mom going to do this weekend? 我个认为“this+名词”的时间短语是不用介词的,因为它相当于副词作状语.
10. He will stay at home to relax himself.