单项选择题
A.Pneumonia. B.Brain infection. C.Over-population. D.Over-eatin
A.Many animals have poor eyesight while their sense of smell, is quite good. B.Dogs are color blind. C.The human sense of smell is not good. D.Dogs can see no more than shades of gray.
A. The more words you are familiar to B. The more words you are familiar with C. You are familiar to more words D. You are familiar with more words