用适当的连词填空

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

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

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

　　---Sorry, I’ve no idea.

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

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

　　6. ---Is David at school today?

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

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

　　8. Study hard, _____ you are sure to have a good result in the exam.

　　9. Please have a wash _______ you go to bed.

　　10. The twins have learned a lot ______ they came to China.

　　1.Although/ Though

　　2.so

　　3.if/ whether

　　4.so

　　5.but

　　6.because

　　7.Either…or

　　8.and

　　9.before

　　10.since