7. _____ Lily _____ Lucy may go with you because one of them must stay at home.

6. ---Is David at school today?

　　 ---No. He is at home _______ he has a bad cold.

5. The war was over about a year ago, ______ the American soldiers in Iraq are still having a lot of trouble to deal with.

4. Mr. Brown knows little Japanese, ______ he can’t understand the instructions on the bottle of the pills.

3. ---Do you know ______ I could pass the exam?

　　 ---Sorry, I’ve no idea.

2. The dress was very expensive, ______ I didn’t buy it.

1. ______ they are brothers, they don’t look like each other at all.

10. It is clear that fish cannot live _______ water.

9. You should take more exercise. It’s good ______ your health.

8. ---Which necklace have you lost?

　　 ---The one you gave me _____ my birthday.