1. There / a fall / manual labour / a rise / technology and equipment in recent years.

--> There has been a fall in manual labour but a rise in technology and equipment in recent years.

2. When my father / free time, he usually/ go/ to the museum.

--> When my father has free time, he usually goes to the museum.

3. Students should/ encourage / act / historical stories / have / better understanding / them. 

--> Students should be encouraged to act historical stories because it helps them to have a better understanding of them.

4. He / so depressed / his performance / school.

--> He was so depressed about his performance at school.

5. China / by far / populated country / the world.

--> China is by far the most populated country in the world.

Đây là bài của mình, bạn tham khảo nha. Nếu hay thì cho mình ctlhn nha. Mình cảm ơn bạn nhiều :)))