1. My home hasn't installed a solar water heater. If/ my home/ install/ a solar water heater/ we/ save a lot of energy.

➞ If my home installed a solar water heater , we would save a lot of energy.

2. Not all households in Viet Nam turn off lights during the Earth Hour. If/ all households/ Viet Nam/ turn off lights/ the Earth Hour/ we/ save enough electricity/ develop our rural areas.

➞ If all households in Viet Nam turned off lights during the Earth Hour, we we would enough electricity to develop our rural areas.

1. If my home installs a solar water heater, we will save a lot of energy

2. If all households in Viet Nam turned off lights at the Earth Hour, we could save enough electricity to develop our rural areas

1. My home hasn't installed a solar water heater. If/ my home/ install/ a solar water hearter/ we / save a lot of energy

=> My home hasn't installed a solar water heater. If my home installed a solar water heater, we would save a lot of energy.

2. Not all household in Viet Nam turn off lights during the Earth Hour. If/all households/ Viet Nam/ turn off lights / the Earth Hour / we/ save enough electricity / develop our rural areas

=> Not all household in Viet Nam turn off lights during the Earth Hour. If all households in Vietnam turn off lights during the Earth Hour, we would save enough electricity to develop our rural areas.

4. People use aluminium cans instead of glass botter . If/ people/ use/ glass boter / they /use/ again and again

=> People use aluminium cans instead of glass bottle. If people used glass bottle, they would use again and again.

5. Our school ground is large but we don't have a wind turbine. If / we / install /a wind turbine / our school / becom / more eco friendly

=> Our school ground is large but we don't have a wind turbine. If we installed a wind turbine, our school would become more eco friendly.

6. People don't use organic fertilizers. If/ people / use / organic fertilizers / they / prevent/ land pollution

=> People don't use organic fertilizers. If people used organic fertilizers, they would prevent land pollution.

7. A large number f people ride their motorbikes to word . If / people /ride/ bikes /they/ keep /air / less polluted

=> A large number of people ride their motorbikes to word . If people rode bikes ,they would keep the air less polluted.

8. That factory doesn't have a wastewater treatment system. If / that factory / have / wastewater treatment system / river/ not become / so polluted

=> That factory doesn't have a wastewater treatment system. If that factory had wastewater treatment system, river wouldn't become so polluted.

1. My home hasn't installed a solar water heater. If/ my home/ install/ a solar water heater/ will save a lot of energy.

If my home installed a solar water heater we would save a lot of money
1. Noise pollution/ any loud sounds/ either harmful or annoying/ humans and animals.
➜ Noise pollution is any loud sounds that are either harmful or annoying to humans and animals
2. Generally/ noise produced/ household appliances/ big trucks/ vehicles and motorbikes/ on the road/ planes
helicopters flying over cities/ loudspeakers, etc.
Generally, noise is produced by household appliances, big trucks, vehicles and motorbikes on the road, planes helicopters flying over cities, loudspeakers, etc.
3. A large number of people ride their motorbikes to work. If/people/ ride/ bikes/they/ keep/ air/less polluted.
If people rode the bikes, they would keep air less polluted
4. That factory doesn't have a wastewater treatment system. If/ that factory/ havel wastewater treatments river/ not become so polluted.
If that factory had wastewater treatments, the river wouldn't become so polluted

IV. Complete the sentences with the correct form of the verbs.
1. Three years ago, we_____didn't install______(install) a solar water heating system on our roof
2. If the electricity_______is made_________(make)from wind turbines, it is green.
3. You should avoid ________using_______(use) cars or motorbikes for short trips.
4. At the same time tomorrow we _______will be walking____ (walk) through the streets of London.
5. London __________is_ (be) one of the most populated cities of the world.
6. No one ______wants_____ (want) to be homeless-it's dangerous and stressful
7. So far, Ha Tinh city ______has changed_____ (change) a lot.
8. We ________haven't taken___ (not take) a trip to Ha Long bay due to Covid-19 pandemic yet.

IV. Complete the sentences with the correct form of the verbs.
1. installed
2. is made
3. using
4. will be talking
5. isis
6. wants
7. has changed
8. haven't taken

1. didn't install
2. is made
3. using
4. will be walking
5. is
6. wants
7. has changed
8. haven't taken

1. should / the amount/ your/of/ family/reduce/ electricity

-> Your family should reduce the amount of electricity

2.showers/ can/neighbor/ because/water / my/ taking/ save/suggest/ they

-> My neighbor suggest taking showers because they can save water

3.the sun/ the roof / solar panels/ on / of / the energy / installed / a house / from/ are/ to receive

-> Solar panels are installed on the roof of a house to receive the energy from the sun

4. turn off/ when/ must / the classroom/ remember/ you / the fan/ to / leave /you

-> You must remember to turn off the fan when you leave the classroom

5. love/ tv/ do / has to / home work/ would / to / but/ his / minh / watch/ he

-> Minh would love to watch TV but he has to do his homework

1. should / the amount/ your/of/ family/reduce/ electricity

-> Your family should reduce the amount of electricity

2.showers/ can/neighbor/ because/water / my/ taking/ save/suggest/ they

-> My neighbor suggest taking showers because they can save water

3.the sun/ the roof / solar panels/ on / of / the energy / installed / a house / from/ are/ to receive

-> Solar panels are installed on the roof of a house to receive the energy from the sun

4. turn off/ when/ must / the classroom/ remember/ you / the fan/ to / leave /you

-> You must remember to turn off the fan when you leave the classroom

5. love/ tv/ do / has to / home work/ would / to / but/ his / minh / watch/ he

-> Minh would love to watch TV but he has to do his homework

2) we use natural resources like solar energy instead of fossil fuels.

3) solar panels will be installed on the roofs of houses to catch solar energy

5) remember to turn off all electrical appliances when you leave house

III. Fill in each blank with one suitable word. (1,5pts)

1. It's possible to.......use.......solar energy for a nümber of days.

2. Solar energy doesn't cause.......pollution..........

3. If we go on......littering......... our environment will become seriously polluted.

4. A......environtmentalist............is a person who works to protect the environment from damage or destruction.

5. If we keep our environment clean, we will live a happir and.......healthier.......life.

6. My friend........suggested............taking showers because we can save water

III. Fill in each blank with one suitable word. (1,5pts)

1. It's possible to......use........solar energy for a nümber of days.

2. Solar energy doesn't cause......pollution...........

3. If we go on.......wasting ........ our environment will become seriously polluted.

4. A.........environmentalist.........is a person who works to protect the environment from damage or destruction.

5. If we keep our environment clean, we will live a happir and......easier........life.

6. My friend..........suggested..........taking showers because we can save water

1 is increasing

2 installed

3 will happen

4 will be built

5 is made

1. is creasing

2.  installed

3. will happen

4. has been built

5.  is made

1. will increase

2. installed

3. would happened

4. has been built

5. is made