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Paragraph 3__________.参考答案：
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单选题：Paragraph 3__________.
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Techniques to employ the energy of the sun are being develop
Techniques to employ the energy of the sun are being developed.A．convert B．store
回答题：The first four minutesWhen do people decide whether or n
回答题：The first four minutesWhen do people decide whether or not they want to be
The experimenters thought Washoe was intelligent__________
The experimenters thought Washoe was intelligent__________A．if the Gardeners` ar
The news will horrify everyone.
The news will horrify everyone.A．attract B．terrify C．tempt D．excite
These are defensive behavior patterns which derive from our
These are defensive behavior patterns which derive from our fears.A．stem B．rely