1. It didn't rain yesterday. So I had to water the plants yesterday.
—> If it (rain).....yesterday, I (water / not)...... the plants.
2. It didn't rain yesterday. So I am watering the plants now.
—>If it (rain).......... yesterday, I (water/ not) .............. the plants now.
Chọn câu phát biểu đúng và cho ví dụ:
a) Oxit axit thường là oxit của phi kim và tương ứng với một axit.
b) Oxi axit là oxit của phi kim và tương ứng với một axit.
c) Oxit bazơ thường là oxit của kim loại và tương ứng với một bazơ.
d) Oxit bazơ là oxit của kim loại và tương ứng với một bazơ.
Ex 8. Give the correct form of given verbs.
1.If there were fewer cars on the road, there (be) .................... less pollution. 2. If there was no fresh water in the world, what (happen) .................... . 3. If I can arrange one week off work, I (travel)................ to Korea. 4. If he (not throw) ................... litter in front of the railway station, he wouldn't be fined now. 5. If you (be)............... the president, what would you do to help the environment? 6. If you want to reduce the light, I (turn off) ....some LED bulbs. 7.I (never witness)....................any natural disaster in my life. 8. The Kyoto protocol (sign) ................by 2003. 9. The concert (begin)..................... at 7.30 pm and (last) ............... .. two and a half hour. Don't be late. 10. An earplug (insert)................... in the ear canal to protect the user's ears from loud noises.
Ex 7. Read the text and do the following tasks.
Peshtigo Fire
On October 8, 1871, the most devastating forest fire in American history swept through northeast Wisconsin. The blaze began at an unknown location in the dense Wisconsin forest. It first spread to the small village of Sugar Bush, where every resident was killed. Strong winds then sent the 200-foot flames racing northeast toward the neighboring community of Peshtigo. Temperatures reached 2,000 degrees Fahrenheit, causing trees to literally explode in the flames. The wildfire even jumped across the Peshtigo River, trapping both sides of the town in flames.
After raging for about two hours, the fire burned more than 280,000 acres in Oconto, Marinette, Shawano, Brown, Kewaunee, Door, Manitowoc and Outagamic counties. The human toll was 1,152 known dead and another 350 believed to be dead. Another 1,500 were seriously injured and at least 3,000 made homeless. The property loss was estimated conservatively at $5,000,000 and this did not include 2,000,000 valuable trees and a large number of animals. Despite the massive scale of the blaze, it has been overshadowed by the Great Chicago Fire, which began on the same day about 250 miles away.
1). Complete the summary with ONE word from the reading text.
Peshtigo Fire is regarded as the worst forest fire in American history. It started in the Wisconsin forest and quickly spread to a large area of 280,000 acres by strong (1)............ The fire jumped across the Peshtigo River and burned on both sides of the town. The human death (2)................. was roughly 1,500 and about 1500 people were badly (3)........ In addition, thousands of people were left (4).................. Although this fire wreaked havoc across a large area and caused heavy loss of life and damage to (5)..................., not many Americans know about it.