Exercise 7: Choose the correct word to complete each sentence.
1. You should wait here when / until / while your parents come back.
2. While / After / Before the party, there was a lot of food left.
3. My sister was sleeping when / as soon as / while I was studying for the test last night.
4. As soon as / While / After I left home for school, it rained heavily.
5. The train arrived while / as soon as / before Elle was having lunch.
6. Because / Although / If the water is very cold in January, they go swimming anyway.
7. My father goes jogging every morning before / after / until he gets ready for work.
8. I learned a lot about wildlife until / after / as soon as I visited Cuc Phuong National Park yesterday.
9. I usually drink a glass of warm milk after / until / before I go to bed.
10. Who takes care of the baby when / after / before your mother is away?
11. After / Before / While we receive your confirmation email, we will send you a link to download the program.
12. I have to wait while / before / until my mum comes home.
13. Before / When / While she is ready, we will leave.
14. I'll send you a text message until / as soon as / before I hear from Nam.
15. Before / After / While she goes, she will turn off all the computers.
16. He will send them an email before / until / as soon as he arrives in London.
17. I will give you my reply before / by / this time I leave this afternoon.
18. I'll go online while / as soon as / until I get home.
19. Before / Until / When Mr. Tan phones, please let me know.
20. Let's play with the children after / until / while it is time to go.
Exercise 8: Complete each sentence with the correct preposition.
1. Coal power stations release sulfur dioxide ______ the atmosphere.
2. National parks play a key role ______ saving the environment.
3. What type of effect does water pollution have ______ our life?
4. Forests provide a habitat ______ hundreds of species ______ plants and animals.
5. Technology is already playing a key role ______ environmental protection.
6. There is a nice play area ______ the children.
7. The regions are home ______ bears and mountain lions.
8. I'd like to emphasize the importance ______ protecting endangered species.
9. Avoid dumping waste ______ lakes and rivers!
10. Remember to turn ______ devices when you are not using them.
11. Toxic chemicals continue to be dumped ______ the river.
12. Orange juice is rich ______ vitamin C.
13. The pools provide a rich habitat ______ water plants.
Answer (2)
For Exercise 7, I provided the correct words to complete the sentences based on context. In Exercise 8, I filled in the sentences with appropriate prepositions. These answers reflect common usage in English grammar and vocabulary.
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Exercise 7: Choose the correct word to complete each sentence.
You should wait here until your parents come back.
After the party, there was a lot of food left.
My sister was sleeping while I was studying for the test last night.
As soon as I left home for school, it rained heavily.
The train arrived while Elle was having lunch.
Although the water is very cold in January, they go swimming anyway.
My father goes jogging every morning before he gets ready for work.
I learned a lot about wildlife after I visited Cuc Phuong National Park yesterday.
I usually drink a glass of warm milk before I go to bed.
Who takes care of the baby when your mother is away?
After we receive your confirmation email, we will send you a link to download the program.
I have to wait until my mum comes home.
When she is ready, we will leave.
I'll send you a text message as soon as I hear from Nam.
Before she goes, she will turn off all the computers.
He will send them an email as soon as he arrives in London.
I will give you my reply before I leave this afternoon.
I'll go online as soon as I get home.
When Mr. Tan phones, please let me know.
Let's play with the children until it is time to go.
Exercise 8: Complete each sentence with the correct preposition.
Coal power stations release sulfur dioxide into the atmosphere.
National parks play a key role in saving the environment.
What type of effect does water pollution have on our life?
Forests provide a habitat for hundreds of species of plants and animals.
Technology is already playing a key role in environmental protection.
There is a nice play area for the children.
The regions are home to bears and mountain lions.
I'd like to emphasize the importance of protecting endangered species.
Avoid dumping waste into lakes and rivers!
Remember to turn off devices when you are not using them.
Toxic chemicals continue to be dumped into the river.
Orange juice is rich in vitamin C.
The pools provide a rich habitat for water plants.
