Ôn tập Unit 7 môn Tiếng Anh 8

 in the cities may cause light pollution. (electricity)
4. Nowadays, people use too much herbicide so many animals don’t have enough food and they become _____________ (sickness)
5. Oil spills from ships in oceans and rivers lead to the _____________ of many aquatic animals and plants (die) 
II. Choose the correct option A, B, C or D to complete the sentences.
1. ________ water is one of the factors that have driven many species to the verge of extinction. 
A. Contaminating	B. Contaminate
C. Contamination	D. Contaminated
2. It’s recommended that we become more concerned _______ the environment around us.
A. of	B. to 	C. with 	D. about
3. The ________ use of pesticides and herbicides has led to contamination of groundwater in some areas.
A. widespread	B. occasional	C. general	D. experimental
4. Air _______, together with littering, is causing many problems in our cities today.
A. pollute	B. pollution	C. polluting	D. polluted
5. Many people in this city have received medical _____ for the disease.
A. support	B. treatment	C. help	D. assistance
6. The reduction in air pollution was _____ last year.
A. drama	B. dramatise	C. dramatically	D. dramatic
7. In many poor nations, there are frequent outbreaks of cholera and other diseases because people there ________ untreated water.
A. drink	B. to drink	C. drinking	D. drank
8. The road in front of my office is always ____ when it rains heavily.
A. to flood	B. flooding	C. flood	D. flooded
9. Too much carbon dioxide in the atmosphere cause global _____ 
A. warm	B. warming	C. warmly	D. warmth
10. It won’t be possible to save the Earth if we don’t take ____ right now.
A. action	B. job	C. work	D. duty
III. Fill each blank with a word/ phrase in the box.
 substance, light pollution, Earth’s surface, water temperature, dumping poison, poisonous, waste, acid, surprised, air pollution.
1. If this factory continues ________________ into the lake, all the fish and other aquatic animals will die.
2. I think the..., candy wrappers. It adds up (1) _____________ much trash do you produce?
	Americans throw away an average of one ton of trash per person (2) _____________ . Most of this trash gets buried (3) __________ big holes in the ground called landfills. A lot of this garbage can be recycled, or turn back (4) ____________ something useful. Just about any material can be recycled. The main things we cycle today are (5) __________ from metal, paper, glass, or plastic. 
	People recycle for many reasons. One of the (6) ____________ reasons is to conserve resources. Making new aluminum cans out of old ones means less aluminum is needed (7) ____________ new cans. This leads to a second reason people recycle: It saves energy. Recycling old aluminum cans takes a lot (8)_____________ energy than making new aluminum. To make new aluminum, you (9) _______________ to mine metal ore from the ground, remove the impurities, and refine it into a finished metal. Recycling also conserves valuable land. (10) ___________ recycling, we produce less garbage. That means fewer landfills are needed for dumping our trash.
II. Choose the correct word by underlining it.
	Nowadays, people use a lot of plastic bags and often (throw away/ bury) the bags afterwards. They don’t often (pollute/reuse) or (waste/recycle) them. When we (destroy/reuse) plastic, we pollute the lands or air. It isn’t a good idea to (burn/ poison) plastic because it (poisons/saves) the atmosphere. The alternative is to (bury/ pollute) it, but some plastic doesn’t decompose for over a thousand years. 
III. Choose the correct word A, B, C or D for each gap to complete the space
	Rivers are (1) _______ of the world’s most important natural resources. Many cities are on large rivers, and (2) ____ every country has at least one river that (3) ___________ an important part in the lives of its people.
	Besides transportation, rivers (4) _________ food, water for crops, water to drink, and opportunities for recreation for people who... Make up sentences using the words and phrases given.
1. most/ people/ not know/ where/ their / plastic/ waste/ go?
..
2. what/ happen/ rubbish/ your / area?
..
3. noise/ pollution/ occur/ because/ there/ too many/ loud/ sounds/ environment.
4. many/ animals/ eat/ litter/ become/ sick/because/ people/ throw/ it/ ground.
5. people/ will/ more/ aware/ protecting/ environment/if/there/ more/ warnings/ about/ danger/ of / pollution.
II. Rewrite the following sentences so that their meaning stays the same.
1. There was a loud noise next to my door last night so I couldn’t sleep (because) 
2. The tsunami happened. Many people in this area became homeless. (made)
3. The acid rain happened last month. Many plants and trees died ( since)
4. There have been conflicts in that country since last year. People live unhappily. (if)
5. This factory doesn’t treat its waste well so there is a lot of water pollution. (if)
UNIT 7 – VO BAI TAP
A. PHONETICS
I. Find the word which has a different sound in the part underlined.
1. A. algal	B. aquatic	C. contaminate	D. permanent
2. A. thermal	B. thankful	C. there	D. thorough
3. A. pollution	B. earplug	C. dump	D. dust
4. A. untreated	B. measure	C. please	D. bread
5. A. physical	B. visual	C. music	D. because
II. Find the word which has a different position of the main stress.
1. A. affect	B. pollute	C. effect	D. litter
2. A. cholera	B. pollutant	C. permanent	D. groundwater
3. A. radiation	B. political	C. historical	D. contaminant
4. A. seriously	B. measurement	C. scientific	D. logical
5. A. aquatic	B. historic	C. physical	D. botanical
B. VOCABULARY AND GRAMMAR
I. Put the words in brackets into right forms to complete sentences.
1. Many fish in the lake near my house have died because of the ________ water (pollute) polluted
2. My friend and I are going to give a presentation about our ____________ problems (environment) environmental
3. Too much use of ______________ lights in the cities may cause light pollutio