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.