单项选择题


Questions 19 to 22 are based on the conversation you have just heard.

A．Yes.
B．No.
C．Hard to say.
D．Not mentioned.
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填空题
According to the passage, making monetary policy changes ______.
单项选择题
______ believe(s) that birds as well as some other non-human animals show intelligence.
A．Biologists
B．A new generation of scientists
C．Researchers of the University of Arizona
D．Only Dr Hunt and his colleagues
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