Complete the exercises from the photo.

1. Charles Dickens wrote about the social problems of his time.
2. Child labor became a major issue during the Industrial Revolution.
3. Laws against child labor were introduced in the 19th century.
4. Education became mandatory for children in the early 20th century.
5. Children are now considered an essential part of the economy.
6. A few centuries ago, child labor was common around the world.