Combine the sentences using and or but.
(Viết lại câu sử dụng “and” hoặc “but”.)
1. Solar panels are expensive to buy, but they save a lot of money by taking energy from the sun.
2. He works at a coal __________. It produces the electricity for Springfield Town.
3. The good thing about __________ energy like solar power is that it never runs out.
4. Non-renewable energy sources like coal causes a lot of __________ which is bad for the environment.
5. My cooker uses __________. We have to replace the bottles twice a year.
6. __________ sources like coal and oil cannot last forever.
7. __________ is a very powerful energy source, but it can be very dangerous.
8. He repairs the __________ when they break down and stop turning.