----- Nội dung ảnh ----- V. Choose the best answer 1. People rarely (is using/ use/ used/ uses) solar energy because it's expensive. 2. (Wind/ Oil/ Coal/ Natural gas) power is a renewable source. 3. The energy we use that produces carbon dioxide might create a big (non-renewable energy source/ renewable energy source/ fossil fuels). 4. "Non-renewable energy" means that it will (produce/ run out/ replace) if we use it. 5. People put (plastics/ solar panels/ nuclear/ biogas) on the roof to catch the sun's energy. 6. Nuclear power is expensive and (conveniently/ abundant/ dangerous) plentiful. 7. Sit down! You (are stand/ stand/ are standing/ stood) on the flowers. 8. Tomorrow is Mai's birthday. I (will pack/ is packing/ packing) this gift to her at the moment. 9. In the countryside, people will burn plants to produce (hot/ heat/ heating) water (turbines/ panels/ pipes). 10. Susan got a plumber to check cracks in the water (turbines/ panels/ pipes).