根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Little－known facts about germs
Germs are everywhere and in so many forms.____ There are some steps you can take to help prevent the spread of germs in your personal space.
Computer keyboards can have more germs than a public toilet.Keys and spaces on a keyboard are main breeding grounds for bacterial and viral growth.____ Clean your keyboard regularly with specialized wipes for electronics，and remove dust with an air duster.
____ While it seems to make sense that covering your toothbrush would protect，the opposite is the case.With a cover on your brush，a more humid environment is created and more likely to encourage growth of germs.Wash your toothbrush when done，and allow it to air dry.Make sure you store it away from the toilet.
Hand sanitizer(洗手液) does not always replace soap and water washing.Hand sanitizer is great when you're not near a sink，and need to clean your hands.But given the choice of a spritz of sanitizer or good old soap and water，choose the soap and water route.____ Lather up and scrub hard for at least 20 seconds，and wash between your fingers and the back of your hands.Don't skimp with the hand sanitizer either—cover the same hand areas as for soap and water.
____ If you freeze foods that you suspect might be spoiled，freezing them will not kill the germs already in the food.Freezing prevents further bacterial growth，but when you thaw it out，the bacteria continue to increase and pollute your food.
A．Freezing food does not kill germs.
B．Try not to eat outside especially in summer.
C．Exposure to germs can lead to many illnesses.
D．Toothbrush covers do not protect your brushes from bacteria.
E．There are a lot of effective ways to get rid of germs in your house.
F．Soap and water are only a better germ fighter when done properly.
G．Some reports show five times more germs on a keyboard than on a public toilet.
应中都只能作氧化剂；