单项选择题

It is （）that mainly helps you respond to a dangerous or stressful situation.

A．a signal sent by your brain
B．the special function of the adrenal gland
C．all stimulated parts of your body
D．All of these

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单项选择题
Why did Bond stop in the doorway to the underwear shop（）

A．To sac who was following him.
B．To look at the man in the fun suit.
C．To avoid the sunshine.
D．To look at the underwear.
单项选择题
It can he inferred from the passage that the author was （）

A．a scientist as well as a naturalist
B．a naturalist but not a scientist
C．no more than a born naturalist
D．first of all a scientist
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