Trả lời: There are a lot of volunteering opportunities for teenagers. For example, they could (29) join charity projects organised by their school or community. Volunteer activities such as picking up (30) litter to make their local area a cleaner and nicer place for everyone are good...
Trả lời: 34. Which is the best title for this text?A. Best inventions in the worldB. Inventions made by luckC. Inventions from hard workD. Foods discovered by accident35. Who helped invent Coca-Cola?A. A scientistC. A chefB. A teacherD. A lab assistant36. Which is the most recent invention?A...