单项选择题

By observing the behavior of animals, scientists may be able to ______.

A．prevent disasters
B．organize groups of people
C．predict earthquakes
D．control areas of California
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单项选择题
People should ______ when deciding wheher to have a negative rich environment.
A．note their own reactions
B．move to a healthier area
C．observe domestic animals
D．watch how wealthy people behave
单项选择题
What is the relationship between the color of the tomatoes and lycopene
A．The light red tomatoes do not contain lycopene.
B．The darker green and yellow the tomato is, the less lycopene it contains.
C．The lighter red the tomato, the less lycopene it contains.
D．Green and yellow tomatoes contain less lycopene.
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