1) Antibiotics are drugs that can be used to kill ............ without harming you . a) Fungi b) Bacteria c) Viruses 2) ........... viruses can fit in a human cell . a) 5000 b) 500 c) 50,000 3) Some diseases are caused by bacteria such as ............. a) Food poisoning . b) Colds . c) influenza . 4) ............. we can see with electron microscope . a) Fungi b) Bacteria c) Viruses 5) ........... are not made of cells . a) Viruses b) Fungi c) Bacteria 6) Some white blood cells make chemicals called .............. to destroy the bacteria . a) Antibiotics b) Antibodies c) Microscope 7) Mucus is a sticky substances inside the ............ which traps many of pathogens . a) Ears b) Nose  c) Mouth

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