I want to be a pianist, so I have to practice the piano d___________. 2. This company spend a large a_________ of money on advertisement every year. 3. Do you realize that everyone must o_________ the law . 4. There is not enough water to f_________ the boat. 5. Time f___________. We have all grown up. 6. W ________ are very useful in in our daily life. 7. After a hard day at work, I spent the evening r___________ in front of the computer . 8. This pair of shoes makes me walk more c__________ than that pair. 9. They have i_________ the price of petrol again. 10. I went to the city, but my brother r___________ in the town. 11. The white color is a s_________ of purity. 12. Stop playing computer games and help me c _________up the bed room. 13. The t_________ of waste water is very important to protect our environment. 14. Do you know anyone in that w__________? 15. Water flows into our houses through p_________.