单项选择题

What is the main topic of the conversation

A．The development of the automobile.
B．Declining air quality.
C．The structure of nitrous oxides.
D．Air quality management.
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单项选择题
A．Heavy rains and storms caused rivers to overflow.B．Flooding has forced evacuations in seven counties.C．Flooding has damaged homes and cut off electricity.D．Heavy rains and flooding kept banks closed.
A．Heavy rains and storms caused rivers to overflow.
B．Flooding has forced evacuations in seven counties.
C．Flooding has damaged homes and cut off electricity.
D．Heavy rains and flooding kept banks closed.
单项选择题
When will they discuss the agenda
A．Before dinner.
B．During dinner.
C．After dinner.
D．Tomorrow.
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