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.

1.The Muong earn a living by farming and raising animals.

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

Topic 1: Advantages of living a healthy lifestyle

Living a healthy lifestyle brings many advantages to our life. First, it helps us stay strong and avoid many diseases. When we eat healthy food and exercise regularly, our body works better and we feel more energetic. A healthy lifestyle also helps us feel happier and less stressed after a long day. Moreover, it helps us study and work more effectively and live a longer, better life.

Topic 2: Family traditions or customs at New Year

At New Year, my family has many meaningful traditions. Before Tet, we clean and decorate our house together. On New Year’s Eve, we have a big family meal and watch fireworks on TV. On the first day of the year, we visit our relatives and give lucky money to children. These traditions help our family feel closer and happier.

Topic 3: Things I do to help my family

I often help my family with many daily activities. I clean the house, wash the dishes, and take out the trash every day. I also help my parents go shopping and look after my younger brother when they are busy. At weekends, I cook simple meals with my mother. Helping my family makes me feel useful and happy.

Xét \(\Delta ABC\) có \(BM\) là đường trung tuyến ứng với cạnh \(AC\) mà \(BM=\frac{1}{2}AC\) suy ra \(\Delta ABC\) vuông tại \(B\).

Tứ giác \(ABCD\) có \(A=D=B=90^{\circ}\)

Suy ra tứ giác \(ABCD\) là hình chữ nhật. 

Xét \(\Delta ABC\) có \(BM\) là đường trung tuyến ứng với cạnh \(AC\) mà \(BM=\frac{1}{2}AC\) suy ra \(\Delta ABC\) vuông tại \(B\).

Tứ giác \(ABCD\) có \(A=D=B=90^{\circ}\)

Suy ra tứ giác \(ABCD\) là hình chữ nhật. 

Xét tứ giác AHCD có:

I là giao điểm của 2 đường chéo AC và DH(gt)

Mà I là trung điểm AC và DH

Vạyt tứ giác AHCD là hình chữ nhật