1. (2023六下·兰溪期中) 阅读短文，选择合适的选项 。

Long long ago, cavemen (穴居人) often ate raw (生的) meat. They know nothing about cooking food. Now there are many things to help you cook. In 2050, there will be house robots. They will cook, clean and wash the dished. Before there were many trees, and there were many clean rivers. Now, there are more and more buildings and cars. The air is getting dirtier and dirtier. The water is dirtier, too. We should help the earth (地球) now, so birds will have homes and forests will be healthy and green again. Heal the world! Make it a better place.

1. （1） This article (文章) is about __________.

   A . cavemen's life B . house robots C . environmental protection (环境保护)
3. （2） Cavemen often ate __________.

   A . fish B . rice C . raw meat
5. （3） There are more and more __________ now.

   A . trees B . birds C . cars
7. （4） The air is getting __________ and __________.

   A . dirtier;dirtier B . more;more C . cleaner;cleaner
9. （5） 画线词"Heal"的意思是 __________.

   A . 破坏 B . 拯救 C . 污染