VI.
1. Because of the development of science and technology.
2. More electricity.
3. If people waste energy, it will quickly run out.
4. They should learn how to save energy, for example, they should turn off electric lights when they leave their classrooms.
5. A lot of natural resources such as coal and oil will be saved.
VII.
1. Lan asked me why I didn't ask the teacher to explain the question again.
→ S + asked + O + Wh/H+ S + V(lùi thì): câu tường thuật dạng câu hỏi Wh/H ( lùi thì HTĐ → QKĐ )
@ $Âu$
