Topic 1: There are some ways to have good health in our life. First of all, we should have a logicar diet. For example, we should eat a lot of nutritious food and not smoke or drink. It is very important because food is a vital thing in our life. Besides, we can do exercise every morning such as: Walking, riding bicycles ... To stay healthy. That makes us have a strong mind .Finally, sleep is also very important so we must get enough sleep. If we get enough sleep we will have a joyful spirit. Don't stay up late because it is not good for our health. In short, there are many ways to have good health. We just need to try our best to protect our health . Having good health we can do whatever we want to do and can succeed in life.

Topic 2: Every family has their own traditions and my family is not an exception. We usually celebrate all traditional holidays and family occasions together. Specially, on Tet holiday, my brother will come back home from his work before Tet few days to help my mother clean and decorate the house. My sister will not hang out with her friends on New Year's Eve to celebrate and welcome the moment with our family. We will have reunion meal together. That is my family's tradition.

Topic 3: I always try to help my family with daily tasks. At home, I wash the dishes, sweep the floor, and water the plants. Sometimes I cook simple meals or help my younger brother with his homework. On weekends, I go shopping with my parents to carry heavy bags. These small actions may seem simple, but they reduce my parents and show my love and responsibility toward my family.

1.Muong earn their living by farming and raising animals.

2.They are in the habit of exercising after work.

1.If you don’t drink more water, you will get more acne.

2.My sister wants to see the terraced fields, so she is going to Sa Pa.

3.Unless he spends time on his phone, he will complete his work.

a) Chứng minh tam giác APQ = tam giác BPM (c.c.c)suy ra PQ = PM.

Chứng minh tứ giác có hai đường chéo cắt nhau tại trung điểm của mỗi đường là hình bình hành.

Chứng minh hình bình hành có một góc vuông là hinh chữ nhật.

b) Sử dụng tính chất đường trung tuyến ứng với cạnh huyền trong tam giác vuông bằng một nửa cạnh huyền để chứng minh QP = PI.

Tam giác có hai cạnh bằng nhau là tam giác cân.

 Xét tam giác ABC có đường trung tuyến BM và BM = 1/2 AC

Suy ra: tam giác ABC vuông tại B: ˆB=90o

* Xét tứ giác ABCD có ˆA=ˆD=ˆB=90o

Suy ra: tứ giác ABCD là hình chữ nhật (dấu hiệu nhận biết)

Theo tính chất của hình chữ nhật ta có:

AC = BD; AB = CD; AD = BC

Hai đường chéo AC và BD cắt nhau tại trung điểm M của mỗi đường.

Ta có \(I A = I C\) và \(I H = I D\).

Suy  ra \(A H C D\) là hình bình hành do có hai đường chéo \(A C\) và \(D H\) cắt nhau tại trung điểm \(I\).

Mà \(\hat{A H C} = 9 0^{\circ}\) suy ra \(A H C D\) là hình chữ nhật.