阅读理解。 Have you ever been ill? When you are ill, you must be unhappy because your body becomes hot, and there are pains all over your body. You don't want to work and you have to stay in bed, and you will feel very sad. What make us ill? They are germs. Germs are everywhere. They are very small and you can't find them with your eyes. But you can see them with a microscope (显微镜), we will see a lot of them in it. So your father and mother will not let you drink dirty water. Germs are not only found in water. They are found in air and dust. If you get a cut in the finger, and if some of the dust from the floor goes into the cut, germs will come into your finger. Your finger will become big and red, and you will have much pain in it. Sometimes if the germs go into all of your body, you may have pain in every part of the body. 1. If ____, you may be ill now. [     ] A. you like to stay in bed B. your body becomes hot C. you feel cold in winter D. you feel hot after work 2. A microscope is used for _____. [     ] A. making very big things look much smaller B. making very small things look much bigger C. helping us read the newspapers easily D. helping us when we are nearsighted (近视) 3. Germs can be found _____. [     ] A. everywhere around us B. only in our body C. only in dirty water D. only in a microscope 4. Which of the following statements is TRUE? [     ] A. If things are very small, they are germs. B. If things can't be seen, they must be germs. C. Germs are too small to see with our eyes. D. Your fingers may be cut by small germs. 5. The main idea of the passage is that _____. [     ] A. germs are in dirty water B. it's bad to be ill C. you'd better take care of your fingers D. germs make us ill