Cicero was elected to the principal offices when_________

单选题 Cicero was elected to the principal offices when__________．

A．he got support from his friends
B．he began his career as a lawyer
C．he was committed to social services
D．he was just old enough to run for them

参考答案D

解析: 细节题。文中第二段最后一句提到“He Was elected to each of the principal Roman offices on his first try at the earliest age at which he was legally allowed to run for them．”他在达到被选举年龄时的首次竞选中，就成功当选为罗马主要官员。由此可知，西塞罗在刚满被选举年龄时就被选为主要官员，故选D。

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单选题 根据下面资料，回答题。
One of the key challenges in urban architecture over the next 50 years will be figuring out how to squeeze vast numbers of additional people into urban areas that are already extremely crowded.
London, for example, will somehow have to deal with a projected 100,000 extra inhabitants every year until 2016. The current plan of building new "satellite towns" of the city causes a lot of prob-lems-but architecture think tanks are working on ambitious solutions that go vertical instead of horizontal in search of space.
In terms of population density, London is one of the least crowded major cities in the world--four times fewer people per square kilometer than Paris, for example, six times fewer than New York and eight times fewer than Cairo. But the fact remains that the city´ s population is growing at a rapid rate, and horizontal expansion into the surrounding areas is eating up increasingly important agricultural land, as well as worsening all the transport problems that come with urban growth.
Popular Architecture would propose a radically different solution. The proposal is to go up-wards, with vertical towers of considerable size, each representing an entire new town by the time it´ s completed. Each tower would be 1500 meters high. Beyond mere accommodation, each tower would function as an entire town unit, with its own schools, hospitals, parks and gardens, sports facilities, business areas and community spaces. The population density of such a tower could help lower the individual energy requirements of each inhabitant, reducing the ecological impact of the population as a whole.
The village towers are considered as hollow tubes, with large holes to allow light and air through the entire construction. Occasional floor discs spread throughout the height of the building will give inhabitants large central areas in the middle of the tube to use as gathering spaces.
While the building itself is unlikely ever to be seriously considered for construction-imagine the number of elevators it would need，let alone the safety implications of open areas at such heights and with such wind exposure--the concept can serve as a conversation—starter for urban planners looking to face the challenges of the current and coming centuries.
One key challenging task for urban architects in future is to__________．

A．build new satellite towns
B．work out ambitious plans
C．design less crowded cities
D．accommodate more inhabitants

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单选题 Which of the following cities has the largest population density?

A．Cairo．
B．Paris．
C．London．
D．New York．

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单选题 Horizontal expansion not only wastes land，but makes it hard for London to__________．

A．handle its safety problems
B．resolve its transport issues
C．control its population growth
D．measure its population density

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