Trắc nghiệm Unit 7 Tiếng Anh 9 - Vocabulary

Besides in – class assignments, our teacher often gives some _____  for us to do at home.

I suggest using energy-saving bulb__________ our electricity bill.

Solar panels__________ on the roof of a house to receive the energy from the sun.

In winter, heating _________ for 50 percent of our electricity bill.

Energy can be collected by solar __________ on cloudy days.

If we don’t find _____ sources of power, we will use up all the fossil fuels in the near future.