giúp + giải thích
----- Nội dung dịch tự động từ ảnh -----
IV. Complete the sentences with one word.
1. If we don't save energy, we will
2. Energy sources produce light, heat and
3.
out of it one day.
is a hard black substance that people burn to produce power.
4. We can'nt replace the energy from the sun, wind, or water because they are
many necessary things
5. The sun is a great energy source that provides us
for survival.