单项选择题

A．How animals react to frightening situations.
B．Why mice are particularly fearful animals.
C．Whether fearfulness is a genetic trait.
D．Why certain animals are feared by humans.
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单项选择题
A．She can’t help the man out until later.B．The task will take more time than the man thinks.C．She complains that the man should have come earlier.D．She can’t support the man’s argument during his debate.
A．She can’t help the man out until later.
B．The task will take more time than the man thinks.
C．She complains that the man should have come earlier.
D．She can’t support the man’s argument during his debate.
单项选择题
The best title for the passage would be ______.
A．Hypotheses and Theories
B．On Distinguishing Fact from Fiction
C．The Nature of Science and Scientists
D．Biology and the Scientific Age
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