Exercise 1: Choose the letter A, B, C, or D to indicate the word(s)

CLOSEST in meaning to the underlined word(s) in each of the following

sentences:
1. It is important to contain and properly dispose of hazardous materials to
prevent environmental contamination.
A. crucial B. unnecessary C. unimportant D.
careful
2. The government should strictly regulate and permit industrial activities to
minimize their impact on the environment.
A. dismiss B. allow C. protect D.
reduce
3.The residents of the community actively participate in environmental
conservation efforts.
A. throw B. ignore C. impact D. take part
3. Protecting the environment is crucial for maintaining a diverse range of
ecosystems.
A. varied B. same C. similar D. polluted
4. The release of toxic chemicals into the environment poses a serious threat to
ecosystems and human health.
A. cause B. deadly C. coral D. volunteer
Exercise 2: Choose the letter A, B, C, or D to indicate the word(s)
OPPOSITE in meaning
1. We should save energy by using energy-efficient appliances and adopting
sustainable practices.
A. store B. waste C. renew D. resident
2. It is our responsibility to protect the environment and preserve it for future
generations.
A. destroy B. cover C. little D. contain
3. Implementing measures to reduce greenhouse gas emissions is crucial in
combating climate change.
A. decrease B. cut down C. minimize D. increase
4. Remember to turn off lights and electronic devices when they are not in use
to conserve energy.
A. switch on B. tum down C. go over D. go away
5. Cleaning up polluted water sources is a challenging task that requires
collaboration and expertise.
A. contaminated B. forget C. pure D. non-living
Exercise 3: 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 4: Reorder the words and phrases to make complex sentences.
1.call / I / will / you / I / arrive / as soon as the /airport/ at /.
=> I wil call you as soon as I arrive at the airport.
2. them / should / You / they / help / if / need /.
=> You should help them when they need.
3. will / We/frozen/be/ you / temperature / unless / increase / the /.
=> We will be frozen unless you increase the temperature.
4. after / The / the /shop/ closed / had left / last customer/.
=> The shop closed after the last customers had left.
5. must/You / stop / when / the /turn / red / traffic lights/.
=> You must stop when the traffic lights turn red.
6. always makes / My / breakfast / mother/ for / me / before / goes / to / she /
work/.
=> My mother always makes breakfast for me before she goes to work.
7. is / her / doing / Mai / homework / Nga / while / to / music / is / listening /.
=> Mai is doing her homework whlie Nga is listening to music.
8. come/to/ She / decided/ even though/to/ didn't/like/the/ party / she / it /.
=> She decided to come to the party even though she didn’t like it.
9. Can / help / me / you / the / the dishes / wash / while / cleaning / I'm/ floor/?
=> Can you help me wash the dishes while I’m cleaning the floor?
10. lots of / She /eat/ fried food / not good / shouldn't / as /for/your/it/is/ health /.
=> She shouldn't eat lots of fried food as it is not good for your health.
Exercise 5: Combine each pair of sentences, using the conjunction in
brackets.
1. A serious road accident happened. We were waiting for the bus yesterday.
(while)
 A serious road accident happened while we were waiting for the bus yesterday
2. I had to get the mop. I spilled my juice. (since)
 I had to get the mop since I spilled my juice.
3. He fell down the ladder. His leg was broken. (and)
 He fell down the ladder and his leg was broken.
4. We had picked up trash. We left the campsite. (before)
 We had picked up trash before we left the campsite.
5. It started raining. They were putting up the tent. (when)
  It started raining when they were putting up the tent.
6. I get my parents' permission. I will go out with my friends. (after)
 After I get my parents' permission, I will go out with my friends.
7. The weather was bad. We were on holiday last month. (when)
 The weather was bad when we were on holiday last month.
8. I will call my mom. I get the result. (as soon as)
 I will call my mom as soon as I get the result.
9. It rains. My father usually drives me to school. (when)
 When it rains, my father usually drives me to school.
10.Jack can't play games. He finishes his homework. (before)
 Jack can't play games before he finishes his homework.
11.You are in Ha Noi again. You must come and see us then. (when)
 When you are in Ha Noi again, you must come and see us then.
12.He finds somewhere to live. Then he'll give his parents the address. (when)
 When he finds somewhere to live, he will give his parents the address.
13.I do the shopping. Then I will come back home. (after)
 After I do the shopping, I will come back home.
14.It starts raining. Let's go home before that. (before)
 Let's go home before it starts raining.
15.She must apologize to him first. He won't speak to her until then. (until)
 He won't speak to her until she apologizes to him first.
16.You leave. I will make you a cup of tea. (before)
 Before you leave, I will make you a cup of tea.
17.She will stay at her aunt's house. She is London. (while)
 She will stay at her aunt's house while she is in London.
18.I have decided the issue. I will let you know. (when)
 When I have decided the issue, I will let you know
19.They have built a new road. The traffic will be better. (when)
 When they have built a new road, the traffic will be better
.