填空题

In William Roberts’ experiment, monkeys learned to take one date because they foresaw they would be ______ in the future.

【参考答案】

thirsty
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单项选择题
A．The transportation for the trip is free.B．The class won’t enjoy going on the field trip.C．Some people may not go on the trip.D．Everyone in the class has paid the fee.
A．The transportation for the trip is free.
B．The class won’t enjoy going on the field trip.
C．Some people may not go on the trip.
D．Everyone in the class has paid the fee.
填空题
In order to argue against Dr. Suddendorf, some comparative psychologists have been conducting experiments to prove animals can ______.
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