单项选择题
- A．Men blush more than women.
B．Children blush easily.
C．People blush consciously.
D．It is more or less a learned behavior.
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相关考题
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单项选择题
A．Because the police could not see them in the dark.
B．Because many of them were armed with guns.
C．Because there were not enough policemen to catch them all.
D．Because they were hidden inside big buildings. -
填空题
37（） -
单项选择题
A．It was by continuous exploitation of the environment.
B．It was largely by chance.
C．It was because of houseflies.
D．It was by chance initially and by cleverness now.
