1. was created

2. met

3. its

4. were performed

5. had

6. permission

7. was divided

8. has been

9. is located

1. B (more should be replaced with most)

2. A (friend should be replaced with friends)

3. D (them should be replaced with it)

4. C (last month should be replaced with last year)

1. B   2. B   3. A   4. D   5. A   6. D  7. C   8. A   9. C   10. B  11. B  12. C

\(B=\dfrac{1}{1.2.3}+\dfrac{1}{3.4.5}+...+\dfrac{1}{8.9.10}\)

\(B=2.\left(1-\dfrac{1}{2}+\dfrac{1}{2}-\dfrac{1}{3}+...+\dfrac{1}{8}-\dfrac{1}{9}+\dfrac{1}{9}-\dfrac{1}{10}\right)\)

\(B=2.\left(1-\dfrac{1}{10}\right)\)

\(B=2.\dfrac{9}{10}\)

\(B=\dfrac{9}{5}\)

Introduction:

Hello everyone, we are members of this group and today we would like to present to you our healthy diet plan.
Describing the healthy diet: Firstly, we start our day with three biscuits and two glasses of milk. This gives us the energy we need to start our day. We also make sure to eat four eggs a week as they are a good source of protein.
We believe that fruit is an essential part of a healthy diet, so we make sure to eat two bananas a day. They are rich in potassium and other important vitamins.
In addition to eating a healthy diet, we also do exercise or play sports to keep fit. This helps us maintain a healthy weight and keeps our bodies strong.

Conclusion:

In conclusion, a healthy diet is crucial for maintaining a healthy lifestyle. By incorporating fruits, vegetables, protein, and exercise into our daily routine, we can ensure that we are taking care of our bodies and living our best lives. Thank you for listening.

1. is taking

2. is cooking

3. left

4. sends

5. Skating

Ta có :

+ An cho Bình 6 cái nhãn vở nên số nhẵn vở của An trừ đi 6 cái.

+ Bình nhận 6 cái từ An nên nhưng lại cho Hòa 4 cái nên số nhãn vở của Bình cộng thêm 2 cái.

+ Hòa nhận 4 cái từ Bình nên số nhãn vở của Hòa cộng thêm 4 cái.

Số nhãn vở của An là : 12 + 6 = 18 ( cái )

Số nhãn vở của Bình là : 14 - 2 = 12 ( cái )

Số nhãn vở của Hòa là : 10 – 4 = 6 ( cái )