《2025年课时特训七年级英语上册外研版》

Ⅳ. Complete the passage with the proper form of the words given.
Plants are more than just pretty to look at. There are 1. millions (million) of plants in the world. They give 2. us (we) fruits and vegetables to eat. Some plants even give material for medicine(药). 3. But do you know that plants can do something even more amazing? They can make our homes, schools and workplaces much 4. healthier (healthy).
We spend a large part of our day indoors. Unluckily, the air inside buildings can often be full of chemicals (化学物质). When the air inside buildings 5. gets (get) bad, people feel sick and even hard to breathe.
The good news is that plants are like nature's little 6. heroes (hero). They have magic(神奇的) power to fight against bad air. Scientists found that plants not only breathe 7. in carbon dioxide (${CO_{2}}$), but also some bad chemicals. They breathe out oxygen (${O_{2}}$) and also give moisture (水分) to 8. the air. So we usually feel more comfortable 9. to breathe (breathe) when we have plants around.
So you see, plants are 10. really (real) fantastic! Next time you see a plant, remember all the amazing things it can do for us!

答案： Ⅳ. 1. millions 2. us 3. But 4. healthier 5. gets 6. heroes 7. in 8. the 9. to breathe 10. really