1. If we don't conserve water, we will face serious water shortages.

2. Because of the awful weather, we didn’t enjoy our camping holiday. 

XI. Joining two sentences, using the words in brackets.
1. We must conserve water. Otherwise we will face serious water shortages. (IF)
__________________If we don't conserve water, we will face serious water shortages ______________________________________________
2. The weather was awful. We didn’t enjoy our camping holiday. (BECAUSE OF)
____________________Because of the awful weather, we didn't enjoy our camping holiday____________________________________________
3. Plastic bags are non-biodegradable. They will remain in the environment for many years.
(SINCE)
______________________Plastic bags will remain in the environment for many years since they are non-biodegradable__________________________________________
4. Paul doesn’t think about the planet. He wastes so much water. (IF)
_______________________If Paul though about the planet, he wouldn't waste so much water_________________________________________
5. Water pollution happens. Many aquatic animals such as fish can die. (LEAD)
____________________Water pollution can lead to the death of many aquatic animals such as fish___________________________________________
6. The climate is changing. The earth is getting warmer. (BECAUSE)
_______________________Because the climate is changing, the earth is getting warmer _________________________________________
7. We should stop cutting down so many trees. We endanger our oxygen supply. (UNLESS)
_________________________Unless we stop cutting down so many trees, we will endanger our oxygen supply _______________________________________
8. People begin to recycle. They generate much less trash. (WHEN)
_____________________________When people begin to recycle, they generate much less trash___________________________________
9. We are damaging the ozone layer. The ozone layer is necessary for human existence.
(EVEN THOUGH)
___________________________Even though the ozone layer is necessary for human existence, we are damaging the ezone layer_____________________________________
10. Sue is suffering from skin cancer. She was exposed to radiation when she was young. (SO)
_______________________Sue was exposed to radiation when she was young so she is suffering from skin cancer_________________________________________

1: If we conserve water, we will not face serious water shortages.

2: Water pollution happens lead to many aquatic animals such as fish can die.

3: When people begin to recycle, they generate much less trash.

Because the climate is changing, the earth is getting warmer

Unless we stop cutting down so many trees, we endanger our oxygen supply

When people begin to recycle, they generate much less trash

Even though the ozone layer is necessary for human existence, we are damaging the ozone layer

Sue was exposed to radiation when she was young, so she is suffering from skin cancer

1. fresh water / if we / wasting water / a shortage / a few decades / of / go on / there will be / in /./

→ There will be.............................a shortage of fresh water in a few decades if we go one wasting water....................................................................................

2. the party / I really / you sang / the song "Be My Valentine" / love / last night / which / at /./

→ I really.........................love the song "Be My Valentine", which you sang at the party last night.................................................................................................

3. that cause / People need to / pur environment / and damage to / limit the activities / pollution /./

→ People need to.............................................limit the activities that cause pollution and damage to our environment..............................................................

4. to others / for you / many occasions / your feelings / There are / to express /./

→ There are..................many occasions for you to express your feelings to others...................................................................................................

1 purity

2 collection

3 competition

4 dishonest

1 lived

2 has learnt

3 working

4 to drink

5 are going to visit

6 will be stopped

1 shortest in our class

2 rubbish into the river, we will make the water dirty

3 the highest of the three girls

4 the rubbish, we will protect the environment

had done , will have , saw , was bought

Question37. The only thing is how to go home. It makes me worried. (which)

The only thing which makes me worried is how to go home. 

Question38. The water in this lake very dirty so we can’t swim in it. (too)

The water in this lake too dirty for us to swim in.

Question39. Mary could not go to school yesterday because she was sick. (because of)

Mary could not go to school yesterday because of being sick.

Question40. You helped me a lot with the work. Thank you very much for it. (helping)

Thank you very much for helping me a lot with the work.