What should students do, according to the passage,...

A

- Hướng dẫn giải

Phương pháp giải:

Giải chi tiết:

Students should turn off electric lights when they leave their classrooms to save energy. – câu thứ tư, dòng thứ 4. (Students at school should learn how to save energy, for example, they should turn off electric lights when they leave their classrooms.)