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Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions.

One of the most urgent environmental problems in the world today is the shortage of clean water. Having clean drinking water is a basic human right. However, acid rain, industrial pollution and garbage have made many sources of water undrinkable. Lakes, reservoirs and even entire seas have become vast pools of poison. Lake Baikal in Russia is one of the largest lakes in the world. It contains a rich variety of animals and plants, including 1,300 rare species that do not exist anywhere else in the world. Yet, they are being destroyed by the massive volumes of industrial effluent which pour into the lake every day. Even though laws have been made, the government does not have the power to enforce them. Most industries simply ignore the regulations. The Mediterranean Sea occupies 1% of the world’s water surface, but it is the dumping ground for 50% of all marine pollution. Almost 16 countries regularly throw industrial wastes a few miles off shore.
Water is free to everyone. A few years ago, people thought that the supply of clean water in the world was limitless. Today, many water supplies have been ruined by pollution and sewage. Clean water is now scarce, and we are at last beginning to respect this precious source. We should do something now.

Question 36. According to the writer, one environmental problem in the world today is __________.

A. pools of poison B. safe water shortage C. population explosion D. industrial pollution

Question 37. What is the serious problem of Lake Baikal in Russia?

A. It is the only lake in Russia whose source of water is not drinkable.

B. It is polluted by massive volumes of industrial wastes discharged into it.

C. It is one of the largest lakes that contain a variety of animals and plants.

D. It has 1,300 rare species that do not exist anywhere else in the world.

Question 38. What does the word "them” in the passage refer to?

A. plants B. animals C. laws D. the government

Question 39. What is the message to the readers?

A. We should take action to protect our water sources.

B. We should limit the use of water sources.

C. We should encourage people to use safe water.

D. We should take all water sources into account.

Question 40. The word "sewage” is CLOSEST in meaning to __________.

A. plastic B. poison C. treatment D. waste

36 B

37 B

39 A

40 D

Olm chào em, em chọn đáp án rồi nhấn submit em nhé. Như vậy là em đã làm bài rồi đó.

December is the month when people celebrate Christmas.

Another word for “student” is pupil.

When you have a question in class, you raise your hand.

You use a eraser for removing pencil marks from paper.

Sunday is the day of the week before Monday.

Teachers give students homework to do at home.

You can grow flowers and vegetables in a garden.

You should listen while your teacher is talking.

You use a ruler to draw straight lines.

Vietnamese, maths, science, … are all school subjects.

1. _____December _____ is the month when people celebrate Christmas.

2. Another word for “student” is “_____pupil_____”.

3. When you have a question in class, you raise your _____hand_____.

4. You use a(n) ____eraser______ for removing pencil marks from paper.

5. ______Sunday____ is the day of the week before Monday.

6. Teachers give students _____homework_____ to do at home.

7. You can grow flowers and vegetables in a(n) _____garden_____.

8. You should _____listen_____ while your teacher is talking.

9. You use a(n) ______ruler____ to draw straight lines.

10. Vietnamese, maths, science, … are all school ____subjects______. 

Đề yêu cầu chia ĐT theo thì nào vậy bạn?

work

cuts

walks

watch

1. Yes, I usually try to be aware of what is in the food I eat. because I read labels on packaged foods to check for ingredients, nutritional information, and possible allergens
2. i always eat healthy and natural food because it's very good for my health
3. i eat fast food about twice a week because of its typically high levels of unhealthy fats, sugars, and sodium

Sure, let's work through the exercises step by step.

### I. Choose the word whose pronunciation is different from that of the others.

1. **D. pour** (The others have the /aʊ/ sound, while "pour" has the /ɔ:/ sound)
2. **C. favourite** (The others have the /ai/ sound, while "favourite" has the /eɪ/ sound)
3. **B. repeat** (The others have the /ɪər/ sound, while "repeat" has the /iː/ sound)
4. **A. doctor** (The others have the /oʊ/ sound, while "doctor" has the /ɒ/ sound)

### II. Choose A, B, C, or D to complete the sentences.

1. Hoa is sitting _______________ her parents.
   - **D. between**

2. The Nile river is _______________ than the Mekong river.
   - **B. longer**

3. If the weather ____________ good, I ___________ camping with classmates.
   - **A. is / will go**

4. Hi-tech robots will be able to look _______________ children in the future.
   - **C. after**

5. The food is very _______________.
   - **B. delicious**

6. Many girls and women _______________ aerobics to keep fit.
   - **C. do**

7. Hai can _______________ boxing well.
   - **A. do**

8. In the future, we _______________ go to the moon for our holiday.
   - **B. might**

### III. Write the past and past participle form of the verbs.

1. do – **did** – **done**
2. get – **got** – **gotten/got**
3. teach – **taught** – **taught**
4. give – **gave** – **given**
5. meet – **met** – **met**
6. have – **had** – **had**
7. eat – **ate** – **eaten**
8. ride – **rode** – **ridden**
9. build – **built** – **built**
10. see – **saw** – **seen**

### IV. Supply the correct form of the verbs.

1. Nam **will buy** a new laptop tomorrow.
2. He **did not eat** fish last night.
3. Mary **studies** in the school in the afternoon.
4. Look! The bus **is coming**.
5. Her sister **is not cooking** dinner now. She **is reading**.
6. There **are** no flowers in my garden.
7. Tam and her friend always **go** to school early.
8. **Have** you **seen** a good movie yet?

### V. Arrange the words into the sentence.

1. I have been to Hanoi three times.
2. My brother is the tallest person.
3. He lives very far from his office.
4. Where did you play badminton yesterday?

### VI. Match the verbs in A with the words in B.

0. play - **f. badminton**

1. speak - **a language**
2. go - **swimming**
3. fly - **a kite**
4. have - **dinner**
5. do - **exercise**

### VII. Use words in the brackets to combine each pair of sentences below.

1. If we pollute the air, we will have breathing problems.
2. Because it is raining very hard, we will not go on a picnic tomorrow.

tại sao câu số 4 bài 1 lại chọn after v ạ?

1. She wants to have the party on Saturday.

2. They have the party at her grandmother's house. Because her grandmother's house is bigger than her house.

3. It's thirty-one, in Regent Street.

4. They hold the party at half past four.

5. The girl asks her friends to bring cakes and some games.

6. The man asks her friends to wear jeans.

7. They can play in the garden if the weather is nice.

8. The man asks her friends parents to phone him.

pizza

orange juice

durian

pizza

orange juice

durian

Subject + have/has + V3(ed)
Subject + have/has not + V3(ed)

Have/has + Subject + V3(ed)?

khẳng định: S + have/ has +  v3
phủ định: S + have/ has + not + v3
nghi vấn: Have/ Has + S +  V3