5A

1B

3C

4D

\(#TyHM\)

C

1 Unless there is a sudden change in public opinion, he will win the next election

đang thi mik ko giúp đc, xin lỗi nha

Bh bạn thi xong vậy ạ 

Lỗi rùi, cập nhật lại nha

Lỗi

"Hello teacher, my name is [Tên của bạn]. I’m 16 years old and I’m currently a student in class 10[Tên lớp] at [Tên trường] High School. In my free time, I really enjoy reading books and playing sports because they help me relax after school. Today, I’m going to talk about my chosen topic."

"Nowadays, the environment is facing many serious problems, and I think we can help by taking some simple steps. First, we should reduce waste by using reusable bags instead of plastic ones. Second, it is important to save energy; we should turn off all lights and fans before leaving the room. Finally, we can plant more trees or join clean-up activities in our neighborhood. I believe that small actions can make a big change for our planet."

"Ecotourism is a great way to travel and protect nature at the same time. To be a good ecotourist, first, we should respect the environment by not littering and staying on the designated paths. Second, we should support local people by buying their handmade products or eating at local restaurants. Lastly, we need to save water and electricity even when we are on vacation. By doing these things, we can enjoy our trip while preserving nature for the future."

"Blended learning, which combines face-to-face and online learning, has many benefits. First, it offers flexibility because students can watch lessons and do homework at their own pace. Second, it provides diverse resources, such as educational videos and online quizzes, which make learning more fun. Finally, it helps us improve our IT skills, which are very important in the modern world. In short, blended learning makes education more effective and interesting."

56 are

57 about

58 his

59 It

60 Because

7  haven't seen/saw/was taking

9 meet

11 nagging/trying

12 have been cleaning/haven't finished

13 have......done/met

14 telling/get

15 to use

26. he promised to tell her the truth by the end of the week.

27. one of my job was to supply the village with water.

28. More and more young people are doing volunteer work abroad. 

29. The goal in education is to eradicate racism.

30. When I got to the hospital, they were waiting in the waiting room.

Câu 6:

a: Gọi M là trung điểm của BC

\(AM=2a\cdot\dfrac{\sqrt{3}}{2}=a\sqrt{3}\)

\(\left|\overrightarrow{AB}+\overrightarrow{AC}\right|=2\cdot AM=2a\sqrt{3}\)

b: 

\(AG=GB=GC=\dfrac{2}{3}\cdot a\sqrt{3}=\dfrac{2a\sqrt{3}}{3}\)

\(\left(\overrightarrow{AB}-\overrightarrow{GC}\right)^2=AB^2+GC^2-2\cdot\overrightarrow{AB}\cdot\overrightarrow{GC}\)

\(=4a^2+\dfrac{4}{9}\cdot3\cdot a^2-2\cdot\overrightarrow{GC}\left(\overrightarrow{GB}-\overrightarrow{GA}\right)\)

\(=AB^2+GC^2-2\cdot\overrightarrow{GC}\cdot\left(\overrightarrow{GB}-\overrightarrow{GA}\right)\)

\(=\dfrac{16}{3}a^2-2\cdot\overrightarrow{GC}\cdot\overrightarrow{GB}+2\cdot\overrightarrow{GC}\cdot\overrightarrow{GA}\)

\(=\dfrac{16}{3}a^2-2\cdot GC\cdot GB\cdot cos120+2\cdot GC\cdot GA\cdot cos120\)

=16/3a^2

=>\(\left|\overrightarrow{AB}-\overrightarrow{GC}\right|=\dfrac{4a}{\sqrt{3}}\)