What’s the maiidea of the passage( )
· Germs may make us ill.
· Germs are idirty water.
· Don’t drink dirty water.
· Take care of your fingers.

单选题
· Germs are everywhere around us.
· Making very small things look much bigger.
· There must be lots of germs in it.
· If your finger isn’t cut, there aren’t any germs on it.
· Germs may make us ill.