1. sun/ effective/ source/ power 2. it/ be /cheap 3. it/ be/ clean 4. it/ not cause/ pollution 5. solar panels/ be installed/ roof/ house/ receive/ energy/ the sun 6.it/ can/ store/ a number of days 7. it/ be used/ cloudy days 8. solar energy/ provide / enough power/ world's population 9. we/ save / natural resources/ use / solar energy/ instead/ gas , oil and coal 10. there for lot countries/ world / already / use / solar energy

Cách làm:

- Đọc kỹ các từ trong câu hỏi để hiểu ý nghĩa của chúng.
- Xác định các từ khóa trong câu hỏi để tìm thông tin cần thiết cho câu trả lời.
- Sắp xếp thông tin theo một trình tự logic để tạo thành câu trả lời hoàn chỉnh.

Câu trả lời cho câu hỏi trên:

An effective source of power is the sun because it is cheap, clean, does not cause pollution, and can provide enough power for the world's population. Solar panels can be installed on the roof of a house to receive energy from the sun, and this energy can be stored for a number of days, making it usable even on cloudy days. By using solar energy instead of gas, oil, and coal, we can save natural resources. Many countries around the world are already utilizing solar energy as a renewable and sustainable power source.

It can store energy for a number of days.

Solar panels can be installed on the roof of a house to receive energy from the sun.

It does not cause pollution.

It is clean.