1. Kate is receiving John's message.

2. They are talking in French.

3. He likes using emojis

IV

1. D

2. D

3. C

4. A

5. B

6. B

7. A

8. A

9. D

10. A

11. C

12. A

13. B

14. B

Câu này mình đã làm rồi, cậu xem lại nha!

1. baked

2. donated

3. dropped

4. chatted

5. started

6. walked

7. cried

8. played

9. enjoyed

10. shared

11. A => enjoyed

12. D => last summer

13. B => clean up

14. D => didn't know

15. A => did

1. If Peter could buy a flat, he would live with his parents.

2. Unless John is nervous, he will pass the driving exam.

3. If I knew his email, I could send him an invitation.

4. If you do not leave home early, you will miss the flight.

5. If I did not have the flu, I could go to the party.

a

1. Let's

2. Why don't we

3. Let's

4. we

5. let's

b

6. charge

7. choose

8. asking

9. look

10. hold

1. tries

2. would be

3. do not water

4. will call

5. did not drink

6. will not drive

7. will meet

8. were

sửa lại đề đi cậu

Tóm tắt:

s₁ = 4 km

s₂ = 6 km

t₁ = ? h

t₂ = 30m

v₁ = 3 m/s

v_tb = ? km/h

Giải:

Đổi: \(3m/s=10,8km/h\) ; \(30m=0,5h\)

Thời gian gian người đi xe đạp đi đoạn đường đầu là:

\(t_1=\dfrac{s_1}{v_1}=\dfrac{4}{10,8}=\dfrac{10}{27}\left(h\right)\)

Vận tốc trung bình của người đó là:

\(v_{tb}=\dfrac{s_1+s_2}{t_1+t_2}=\dfrac{4+6}{\dfrac{10}{27}+0,5}\approx11,5\left(km/h\right)\)