完型填空专练. 完型填空。（10分）Flies (苍蝇) usually live in the dirty places. Lets look at a fly, and see where it 1 . First, it flies out of the window, 2 it stands on 3 dirty things in the street, and then it flies back to the house and walks over your 4 .When a fly walks on the dirty things in the street, its 5 have got some germs 6 them. When the fly walks on your food with its dirty feet, it 7 the germs on your food.What can you 8 this?First, we learn that we
