Ex.11. The tree grew to a height of

Ex.11. The tree grew to a height of 20 feet.2. Children under ten can also have 50% discount.3. There was a capital outflow of $ 22 billion in 2011.4. Metal cutting machines have been decreased to 50.5. All the prices have been cut by about $5.6. Overall PWC’ s revenue grew by 7%, slightly up on last year’ s 6%.7. The summit of the snow has been lowered by about 56 feet in 40 years.Ex.21. Millions of hamburgers and French fries are eaten every year by Americans.2. Last year’ s profit was in excess of one billion dollars.3. Up to a fifth of employees in Europe and the US work shifts including nights.4. The price of that tricycle is less than 25 dollars.5. I wrote close to fifty invitations this morning.Ex.31. The value of our industrial output this year has increased five times as compared with that of ten years ago.2. As against last year, our coal output has increased by three times.3. This year, the population of this town has increased to 4 times as compared with that of 2000.4. Nigeria is three times the size of Great Britain.5. My apartment is three times as big as yours.6. Kuwait oil wells yield nearly 500 times more than U.S. wells.7. The wire is 3 times thinner than that.8. The birthrate is reduced to 3 times .9. A rapid decrease by a factor of 7 was observed．10. The equipment reduced the error probability by 5 times.Ex.41. University and college enrollment in 2009 increased by 47.4 percent over the previous year.2. This machine works fifty percent faster than one.3. An increase in lubricant temperature results in 20 percent lower viscosity.4. Cost of raw material is 5% higher than last year.5. Our retail sales of consumption goods are about 130 % that of theirs.Ex.51. A thousand to one he will win.2. He tried in a thousand and one ways to prevent me from telling the truth．3. We have just moved into the house, and everything is at sixes and sevens．