1. The world's first computer was made in 1946. (dòng 1 đoạn 1)

2. Computers were sold commecially for the first time in 1950s. (dòng 2 đoạn 1 ) 

3. Computers are used in many fields- in business, science, medical and education. (dòng 1 đoạn 2) 

4. Computers help us much in our work and they are playing a big part in our lives. 9câu 2 đoạn 3) 

***

1. The boys felt interested in the show. (interested in+V-ing/N; thích, quan tâm đến cái gì) 

2. Because of snowy weather, we didn't go out for a walk.

Because of+cụm N/cụm V-ing (dùng cụm V-ing khi câu cùng chủ ngữ)

3. The police took the wounded people to the hospital. 

Chuyển từ câu bị động về câu chủ động.

4. While Mr.Smith was staying in New York, he first met his wife. 

Hành động đã đang diễn ra (QKTD) thì hành động khác xen vào (QKĐ)

VI/

1. It was made at the University of Pennsylvania in 1946.

2, Computers were sold commercially for the first time in the 1950s.

3. Computers can be used in forecasting weather and controlling robots which made cars.

4. Because computers help us much in our work.

VII/

1. The boy felt interested in the show.

2. Because of snow (snowy weather), we didn't go out for a walk.

3. The police took the wounded people to the hospital.

4. While Mr.Smith was staying in New York, he first met his wife.