单项选择题

Why do we know very little about the central Africa 200 years ago

A．Because there was nothing worth being written down at that time.
B．Because the people there ignored the importance of keeping a record.
C．Because the written records were perhaps destroyed by a fire.
D．Because the people there had not known how to write.

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热门试题

单项选择题

In what way could we have learned much more about our past than we do now

A．If our ancestors had kept a written record of every past event.
B．If our ancestors had not burnt their written records in wars.
C．If our ancestors had told exact stories of the most important happenings.
D．If our ancestors had made more songs and dances.

单项选择题

According to the lecture by whom are the choices generally made

A．By the government only.
B．Through the market only.
C．By the government and through the market.
D．By government officials and economists.