单项选择题


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

A．Studying.
B．Playing cards.
C．Preparing snacks.
D．Learning how to play bridge.
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单项选择题
A．Fishing and hunting.B．Nuclear science.C．He began to show great interest in natural beauty.D．Amateur radio.
A．Fishing and hunting.
B．Nuclear science.
C．He began to show great interest in natural beauty.
D．Amateur radio.
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