单项选择题

We are told that adders are ______.

A．normally friendly towards people
B．unlikely to bite except in self-defense
C．aggressive towards anyone in their territory
D．not afraid of human beings

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单项选择题

If you are with someone who is bitten by an adder you should ______.

A．try to catch the adder
B．make no attempt to treat the bite
C．not worry about the victim
D．operate as soon as possible

单项选择题

Adders are most likely to be found ______.

A．in wilder parts of Britain and Ireland
B．in Scotland and nowhere else
C．on uncultivated land throughout out Britain
D．in shady fields in England