Контрольные задания > 7. Plastic bottle recycling ________
a) is popular and effective work to keep the environment clean
b) doesn't serve to solve the problem of pollution
c) doesn't help much because of the bottles collection problem
Вопрос:
7. Plastic bottle recycling ________
a) is popular and effective work to keep the environment clean
b) doesn't serve to solve the problem of pollution
c) doesn't help much because of the bottles collection problem