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dtmhieu
2 năm trước
Door 1 lit ruou vao 2 lit nuoc roi tron deu thi thay the tich cua hon hop giam di 4% the tich coongj cua ruou va nuoc. Tinh khoi luong rieng D cua hon hop biet khoi luong rieng cua ruou va nuoc lan luot la D1 = 700kg/m³ va D2 = 1000kg/m³
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V- Use the correct verb form: 1. Students ( be)............. aware of protecting the environment if teachers teach environmental issues at school. 2. When light pollution (happen)..................., animals will change their behaviour patterns. 3. The levels of radioactive pollution (decrease) ........................ if we switch from nuclear power to renewable energy sources. 4. If the water temperature (increase)........................., some aquatic creatures will be unable to reproduce. 5. People (get) .................... more disease if the water is contaminated. 6. If people (not rubbish) .......................in the street, it would look attractive. 7. If there (be not)............... so many billboards in our city, people could enjoy the view. 8. If there wasn't so much light in the city at night, we (see) ............the stars clearly. 9. If we didn't turn on the heater all the time, we (not have) to pay three million dong for electricity a month. 10. If the karaoke bar ( not make) so much noise almost every night, the residents wouldn't complain to its owner.

IV- Read and complete aquaticthe passage using the words given: with/ are/industrial /cholera/ Water/ for /aware/ pollution / atmosphere/aquatic .1-................... pollution means one or more substances have built up in water to such an extent that they cause problems 2-............. animals or people. There... 3- ........... also two different ways in which pollution can occur. If pollution comes from a single location, such as .4-................... waste into lakes and rivers, sewage from households, pesticides and herbicides, it is known as point-source ....5-........................ While pollutants from storm water and the .6- ....................... result in "non-point source" pollution. Water pollution can outbreak of 7- ................. and other diseases, even die in human. It also causes the death of ..8-.............. animals and plants and further damage to the environment. Dealing ...9-.................. water pollution is something that everyoneshould do. With the laws, governments have very strict laws that help minimize water pollution. Making people ..10-........................ of the problem is the first step to solving it.

III. Rewrite the sentences: 1. Because people throw litter on the ground, many animals eat it and become sick. (so ) ................................................................................................................................ 2. Oil spills from ships in oceans and rivers made many aquatic animals and plants die.(as) ................................................................................................................................ 3.Because households dump waste into the river , it is polluted. (due to the fact that) ................................................................................................................................ 4.The parents were exposed to radiation, so their children have birth defects.(because) ................................................................................................................................ 5. We can’t see the stars at night due to the light pollution.(because) ................................................................................................................................ 6. People cough because they breathe the fumes from cars.(because of) ................................................................................................................................ 7. The polluted soil makes plants die .(leads to) ................................................................................................................................ 8. We can’t drink the water since it is polluted.(therefore) ................................................................................................................................ 9. We plant trees , so we have fresh air.(due to ) ................................................................................................................................ 10- The animals died because of drinking the contaminated water.(so) ................................................................................................................................

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