Question

пожалуйста я не могу ((((((( даю 20 баллов

Answer 1

1. The first bike with pedals was invented in 1840.
2. The bike on the right was invented 30 years later. It was faster than the first bike.
3. Riding a bike is healthy because it helps you to keep fit.
4. Which of these leaves the most poisonous gases in the air in big cities? Factories?