I. Rewrite the following sentences, using the words in brackets.
1. Water in the Cau River becomes brown and has terrible smell because the waste water is
released from the paper mill in Thai Nguyen City. (so)
→ ………………………………………………………………………………………………
2. Nga ate a big dinner. She had a stomachache. (since)
→………………………………………………………………………………………………
3. Global warming happens when there is too much carbon dioxide (CO2) in the atmosphere.
(causes)
→………………………………………………………………………………………………
4. Because plastic bags take so long to decompose, nearly all of them still exist in the
environment today. (so)
→………………………………………………………………………………………………
5. We can’t see the stars at night. There is too much light pollution. (due to)
→………………………………………………………………………………………………
6. Ngoc’s mother is upset because she doesn’t tidy her room every day. (if)
→………………………………………………………………………………………………
7. We regret it in the future. We use too much energy now. (if)
→………………………………………………………………………………………………
8. People use too much herbicide to treat weeds, so water in rivers. canals, lakes are extremely polluted and has bad effects on people's health. (because)
→………………………………………………………………………………………………
9. Household dump waste into the river. It is polluted. (so)
→………………………………………………………………………………………………
10. Aquatic life suffers or dies because there is thermal pollution. (because of)
→……………………………………………………………………………………………… 11. Noise pollution happens. There is a change in animals’ living pattern. (leads to)
→………………………………………………………………………………………………
12. There are asthma, allergies and other respiratory illnesses when air pollution happens.
(leads to)
→………………………………………………………………………………………………
13. Acid rain is dangerous. Trees’ leaves are damaged. (because of)
→………………………………………………………………………………………………
14. Mai is ill now, so she doesn’t participate in this useful activity. (if)
→………………………………………………………………………………………………
15. Earth gets warmer. The sea level rises. (If)
→……………………………...………………………………………………………………
16. Many fish in the river die due to the increased temperature of water. (because)
→………………………………………………………………………………………………
II. Rewrite the following sentences, beginning the words given.
1. You can’t have a good health unless you exercise more.
→ If …………………………………………………………………………………………….
2. Visual pollution happen when there are too many telephone poles, advertisement
billboards, or shop signs.
→ Too many…………………………………………………………………………………….
3. Unless we take action immediately, the air will become completely polluted.
→ If we………………………………………………………………………………………….
4. Herbicides kill both weeds and aquatic plants.
→ Both weeds and aquatic plants die………………………………………………………….
5. The environment is now in danger because many people do not respect it.
→ If many people……………………………………………………………………………….
6. The water is contaminated, so people get more diseases.
→ Since……………………………………………………………………………………….
7. My uncle suffered from lung cancer because he breathed in unclean air.
→ Because of………………………………………………………………………………….
8. Unless people stop throwing rubbish in the street, the street won’t look attractive.
→ The street will look………………………………………………………………………….
9. Because it rained heavily, the road in front of my house was flooded.
→ Due………………………………………………………………………………………….
10. Too much use of electric lights in cities may cause light pollution.
→ Light pollution may result ………………………………………………………………….
III. Write conditional sentence type I or II for these situations.
1. People eat dirty food. They can be cancer.
→ ……………………………………………………………………………………………..
2. A factory directly discharges a large volume of waste water into the Thi Vai River. The
river is polluted.
→ ………………………………………………………………………………………………
3. Farmers use polluted water to water their plants. People eat these plants, they become sick
with diseases such as diarrhea, bacteria inflections even cancer.
→ ………………………………………………………………………………………………
4. Thermal pollution takes place, the water temperature in streams, rivers, lakes and oceans
will increase or decrease suddenly.
→ .…………………………………………………………………………………………….
5. People live in radioactive pollution area. They can be skin cancer
→ ……………………………………………………………………………………………….
