Đề cương ôn tập Tiếng Anh Lớp 8 (Thí điểm) - Unit 7: Pollution

olluted water causes/ results in the death of the fish.
 to make sb/ sth do sth
Example: The polluted water makes the fish die.
3. Conditional sentences type 1, 2
Type
If clause
Main clause
Type 1
Present simple
Future simple
Type 2
Past simple 
S + would/could/might + V (bare infinitive)
* The conditional sentences type 1 describes a thing which is possible and likely to happen in the present or the future.
Example: If you use less paper, you will save a lot of trees.
* The conditional sentence type 2 can be used to give advice.
Example: If it wasn’t noisy in here, I could hear you clearly. (But it’s very noisy in here)
Example: If I were you, I would see the doctor immediately. 
Note: We can use both was and were with I/he/she/it in the if-clause.
B. EXERCISES
I. Choose the word in each line that has different stress pattern
1. A. scientific
B. dramatic
c. athletic
D. domestic
2. A. national
B. chemical
c. medical
D. informal
3. A. prehistoric
B. economi...imals? HARM 
5. The ____________are concerned about the oil spiIls in the Eat sea.  ENVIRONMENT
6. Dumping __________waste into the lakes and rivers has  caused serious water pollution. INDUSTRY
7. Many people in this area have cholera because they drink   ____     water. TREAT
8. Examples of primary __________ are exhaust fumes from cars, soot from smoke and ash from volcanic eruption. POLLUTE
9. If we use water_________, more people will have fresh water. CARE
10. The polluted water results in the ___________ of many aquatic animals and plants. DIE 
IV. Combine the sentences 11 each pair into a new sentence that slows a cause/ effect relationship. Use the words in brackets.
1. Many rivers and lakes are poisoned. Factories produce waste and pour it into rivers and lakes. (because)
2. The environment is polluted. Birds leave their habitats and plants die. (makes)
3. Plastic bags are a major source of waste. We should not throw plastic bags everywhere. (so)
4. The food is contaminated. People’s health is poor. (results in)
5. Factories release fumes. The air people breathe gets polluted. (due to)
V. Put the verbs in brackets into the correct form to complete the sentences.
1. If the local people drink the contaminated water, they (have)_________ health problems.
2. If there were more trees in this area, the air (be)__________fresher
3. All the aquatic animals (die)__________ if people don’t stop dumping sewage into the lake.
4. Global warming (not happen) __________ if there weren’t too much carbon dioxide in the atmosphere.
5. If the sun (shine)___________ , we will walk to the mountain.
6. If people (stop)_______________ digging the Street, there wouldn’t be noise pollution in this area.
7. People use a lot of cars and motorcycles if people (reduce)__________ the use of motor vehicles, there (be) __________ less serious air pollution.
8. If you (not read) these articles, you (not know)__________ the facts about water pollution.
9. If I (be)___...(8),   ____   of acid rain. This pollution results mainly from the coal powered factories, which produce in expensive goods (9) ____   North American and European consumers. Outdoor air pollution is also a concern in many unhealthy countries. Those who live and (10)     ____ in urban centers such as Los Angeles or Toronto experience many warm days beneath a layer of smog.
VIII. Read the following passage and choose the best answer for each question.
     Every year, the average temperature of the Earth’s surface gets a little bit warmer. This gradual trend is called global warming. Warmer weather may sound nice, but global warming is something to be very concerned about.
    Scientists are worried that continued warmer temperatures could damage the environment in many devastating ways. Rising temperatures might cause plants and animals to become extinct. They could melt enough polar ice to cause the levels of the sea to rise. Weather patterns could also change. There might be more droughts or serious storms with flooding. In some areas, human diseases could spread.
     What is causing global warming? Humans are mostly to blame. Pollution from factories and cars add toxic gases to the air. These gases rise to the Earth’s atmosphere. As the sun’s rays warm the Earth, the gases work much like the glass in a greenhouse. They help trap the heat in the atmosphere and make the Earth grow warmer. That is why they are nicknamed “greenhouse gases.”
    It is our responsibility to take care of our planet. Global warming is a serious problem with serious consequences. If we want future generations to enjoy their time on Earth, we must act now!
1. Which of the following is not a possible effect of global warming?
A. weather patterns changing
B. plants and animals becoming extinct
C. more polar ice
D. human diseases spreading
2. In the sentence: “Warmer weather may sound nice, but global warming is something to be very concerned about.” (in paragraph 1), the author su