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14. The teacher told us the moon travels ______ the earth.

13. Don't read ______ the sun. It's bad ______ your eyes.

12. It's very kind ______ you to help me ______ my maths.

11. ?How do you usually come to school, every day?

?Sometimes ______ bike, sometimes ______ foot.

10. Do the twins look ______ their father?

9. Don't laugh ______ others’ mistakes.

8. I couldn't finish it ______ your help.

7. Thank you very much ______ coming to see me.

6. What's wrong ______ your bike?

5. It's not good to come late ______ school.