1. I am looking forward _______________ your reply. 2. Clean air provides us _______________ a healthy supply of oxygen. 3. The girl is waiting _____________ her father _____________ the school gate. 4. Sorry, I'm _______________ a hurry. 5. What a pity! We left him _______________ saying goodbye. 6. The school library is open _______________ every student. 7. I'm very grateful _______________ you for your invaluable help. 8. He smiled ________ me and then spoke _________ me _________ a foreign language. 9. People are looking ____________ more oil deposits. 10. You have to put ____________ your toys and go to bed. It's late. 11. Why don't we turn ____________ television? The seven-o'clock news is on now. 12. They turn ____________ the water while they repair a burst pipe. 13. If we keep ____________ using more and more cars, we'll run out of gas. 14. There is a power cut and all the lights went ____________. 15. Who is looking ____________ the baby when you are away? 16. Are you still looking ____________ a job? 17. Her father gave ____________ smoking last month. 18. Lan often looks ____________ her younger sister when her mother is out of town. 19. It will be raining ______________ the coast of Vung Tau. 20. The children are going to a park ______________ the other side of the river.