单项选择题

The story happened in______.

A．England
B．America
C．Germany
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单项选择题
Many scientists are working hard to______.
A．make monkeys get in crops and drive trains
B．make monkeys guard house like dogs
C．make bears get in crops
单项选择题
Many different animals may be taught to do some simple jobs if______.
A．they have enough food to eat
B．they learn they will get something to eat in return after doing them
C．they are sent to school
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