单项选择题

The disease had beaten human beings for quite a long time before it was conquered.

A．在相当长的一段时间内，这种病困扰着人们，后来才被攻克。
B．很长一段时间这种病控制着人们，后来被降伏了。
C．很长一段时间这种病控制着人们，后来击垮了人们。
D．这种病被控制前已经打败了人类很长一段时间。
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单项选择题
According to the passage ,which of the following statements is true
A．Overhead bridges are inconvenient only to elderly people.
B．Using overhead bridges can save people some time.
C．It's a waste of money for the government to build overhead bridges.
D．Using overhead bridges' is a way of avoiding danger and deaths.
单项选择题
Overhead bridges are built ______.
A．for heavy traffic
B．for the safety of people
C．for the safety and convenience of drivers
D．to help traffic
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