V.
1. Young people of different nationalities go on expeditions.
2. There are ten expeditions every year.
3. Each expedition lasts for ten weeks.
4. The volunteers help scientists to do environmental research.
5. To become a volunteer, we must know English.
I.
1. c
2. b
3. a
4. a
5. d
II.
1. c
2. d
3. d

1. Although Mr Tan is very busy, he tries to take good care of his children.

2. Although the traffic was heavy, we got to the meeting on time.

3. Although we are close friends, we sometimes have a row.

4. Although Hang took a taxi, she still arrived late for the concert.

5. Although I was tired, I tried to finish the report before going to bed.

6. Although the snow was heavy, the explorers managed to walk to the village.

7. Although the roads in this area are invested a lot of money, they have been flooded in the rainy season.

8. Although he tried hard, he couldn’t improve his Spanish pronunciation.

9. Although he ran fast, he couldn’t catch the last bus.

10. Although the weather was cold, the boys went swimming in the lake near the city centre.

1. Lan studies better than Minh.

2. Her brother speaks English more fluently than her.

3. I work less quickly than Hoang.

4. This computer works more reliably than that computer.

5. Nam can cycle more skillfully than me.

6. John works more carefully than his colleagues.

7. She has prepared for the test more carefully than her classmates.

8. He used to speak English more fluently than me.

9. She can teach English better than her colleagues.

10. She can dance more gracefully than all of us.

1. If you get everything ready, you can start

2. If you study harder, you will pass the coming exam

3. If you do more exercise, you'll feel much better

4. If you are hard-working, you will be successful

5. If you do more exercise, you will be healthy

6. If you hurry, you will arrive at school in time

7. If we recycle waste paper more, we can save thousands of trees

9. If we jion environmental prejects more often, we can help save the Earth

1. I don't play badminton on Saturday.

    Do you play badminton on Saturday?

2. She doesn't go fishig with her father every month.

    Does she go fishig with her father every month?

CT: Thì hiện tại đơn ( The simple present )

(+) I/you/we/they/N_{(số nhiều)}    + V

      she/he/it/N_{(số ít)}                 + V_(s,es)

(-) I/you/we/they/N_{(số nhiều)}    + don't V

      she/he/it/N_{(số ít)}                 + doesn't V

(?) Do  +   I/you/we/they/N_{(số nhiều)}    + V?

     Does +             she/he/it/N_{(số ít)}      + V?

Dấu hiệu: các trạng từ chỉ tần suất như: Always (thường xuyên), often (thường), usually (thường thường), seldom (hiếm khi), sometimes (thỉnh thoảng), hardly ever (hầu như không bao giờ) Every + khoảng thời gian.

Will pick

Tofu is healthy

Many Vietnamese drink green tea

She doesn't use suncream

Father does not exercise every morning

Most children have chapped lips and skin in winter

1. Tofu is healthy.

2. Many Vietnamese drink green tea.

3. She does not use suncream.

4. My father does not exercise every morning.

5. Most children have chapped lips and skin in winter.

                   chúc bn học tốt nhé 

Although my mother got up late this morning, she went to work on time

I usually ride a/my motorbike to work every morning