单项选择题

The passage mainly talks about ______.

A．the effect of diseases
B．how to control the number of certain animals
C．the relationship between diseases and human population
D．different kinds of diseases

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单项选择题

The word vibrant probably means ______.

A．bright
B．soft
C．light
D．dark

单项选择题

What can we infer from the passage

A．Human's future could be depended on advance in medical science.
B．We could introduce certain kind of disease to control the number of some species.
C．Human could control diseases.
D．Introduction of the myxomatosis could control rabbit population in the world.