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 data he collected.B．Notes from research journals.C．His research project.D．The climate changes in his hometown.
A．The data he collected.
B．Notes from research journals.
C．His research project.
D．The climate changes in his hometown.
填空题
The result of Clayton’s recent test that birds hid more pine nuts in the non-breakfast compartment indicates they have ______.
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