选择适当的单词填空。
1. He _______ (is, does) a university student.
2. We often ________ (have, has) art class on Tuesday.
3. She ________ (doesn’t, isn’t) play chess every day.
4. When ________ (do, are) you go to work?
5. Sometimes he ______ (clean, cleans) the room.
6. Mike often ________ (works, work ) up at 6:30.