根据句意用适当的连词填空。
1. I don't know _________ to stay or to go.
2. Go along this street, _________ you'll find the supermarket at the end of it.
3. Do _________ the Romans do when in Rome.
4. Jenny is a lazy girl, _________ she always gets good marks.
5. She can _________ stay at home ________ go out to play.
6. My mother didn't go to bed _________ she finished making the birthday cake for me.
7. Mr Wang speaks _________ clearly _________ everyone can hear him.
8. The swimming pool won't be open _________ the workers are clearing it.
9. Lily is _________ an American ________ a German. She is an English girl.
10. _________ Tom is young, he knows a lot about computers.
11. Let's hurry, _________ we'll be late.