Everyone likes living in a clean and comfortable environment. If the environment is bad, it will affect our body, and make us not feel well. Sometimes we may be terribly ill. Why? It’s germs（细菌）that make us ill. There are germs everywhere, They are very small and you can’t find them with your own eyes, but you can see them with a microscope（显微镜）They are very small and there may be hundreds of them on a very small thing, Germs can always be found in dirty water. When we look at the dirty water under the microscope, we shall see them in it. Germs can also be found in the air and dust（灰尘）. If you cut your finger, some of the dust from the floor may go into it, and you will have much pain in it. Sometimes the germs will go into all of your body, and you will have pain everywhere.
So environment is very important to us. To keep us healthy, we should try our best to make our environment become cleaner and tidier. It needs us to act together.
Germs are the things that________.
A. you can’t see with your eyes
B. you can see everywhere     
C. are very big
Germs can be found_________.
A. on the small thing      B. everywhere               C. only in dirty water
You feel ____________ if germs go into the finger that is cut.
A. nothing             B. painful                 C. relaxed
The underlined word “affect” means __________ in Chinese.
A. 强壮                B. 打动                    C. 侵害
From the passage we know that________.
A. the environment is becoming worse      
B. if the environment is better, germs will be more
C. germs may make us ill