单项选择题

A．City officials.
B．Newly-graduated university students.
C．Experts in various institutions.
D．Some famous scientists.
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单项选择题
A．Iron.B．Copper.C．Gold.D．Lead.
A．Iron.
B．Copper.
C．Gold.
D．Lead.
单项选择题
A．Places the man has visited.B．A paper the woman is writing for a class.C．School activities they enjoy.D．The woman’s plans for the summer.
A．Places the man has visited.
B．A paper the woman is writing for a class.
C．School activities they enjoy.
D．The woman’s plans for the summer.
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