Topic 2: Video calls have become aan essential communication tool today. One major advantage is that they allow people to see each other's faces and body language, making conversations more persontal and effective, especially for long- distance relationship or remote work. However, there are some disadvantages. Technical issues like poor internet connection can disrupt the flow of conversation. Moreover,"Zoom fatigue" is a real problem, as starting at a sreen for too long can be exhausting and lead to privacy cocerns.

1. Marcus wanted to know how many people would come the day after.

2. People will communicate with each other using telepathy in 50 years' time.

1. Marcus wanted to know how many people would come the day after.

2. People will communicate with each other using telepathy in 50 years' time.

Typhoons are one of the most common and devastating natural disasters in Viet Nam, especially in the central coastal regions. They usually occur from August to November, bringing heavy rain and extremely strong winds. When a typhoons hits, it often causes severe flooding, destroys crops, and damages houses and infrastructure. To prepare for typhoons, the government always issues early warning so that people can evacuate to safer places and reinforce their hommes. After the storm passes, local communities work together to clean up the debris and recover. It is crucial to stay updated with weather forecasts to stay safe.

1. I think robots can't replace the role of teachers in education.

2. People will still send letters to each other in 2050.

1. how often eatherquakes occured in that region.

2. I could find a wide range of beauty products in my store.

a) Vì ABCD là hình bình hành nên AB = CD, AB // CD.

Mà E, F lần lượt là trung điểm của AB, CD nên AE = BE, CF = DF.

Do đó AE = BE = CF = DF.

• Xét tứ giác AEFD có:

AE // DF (vì AB // CD);

AE = DF (chứng minh trên)

Do đó tứ giác AEFD là hình bình hành.

• Xét tứ giác AECF có:

AE // CF (vì AB // CD);

AE = CF (chứng minh trên)

Do đó tứ giác AECF là hình bình hành.

Vậy hai tứ giác AEFD, AECF là những hình bình hành.

b) Vì tứ giác AEFD là hình bình hành nên EF = AD.

Vì tứ giác AECF là hình bình hành nên AF = EC.

Vậy EF = AD, AF = EC.