单项选择题

It can be inferred from the passage that the Sun's light travels

A．through solid objects in space
B．in many different directions
C．more slowly than scientists previously believed
D．further in summer than in winter
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单项选择题
Where in the passage does the author compare the energy consumption of skyscrapers with that of a city
A．Lines 4 -6.
B．Lines 7 - 10.
C．Lines 12 - 14.
D．Lines 15 - 16.
单项选择题
According to the passage, in the late 1960s some residents of Boston were concerned with which aspect of skyscrapers
A．The noise from their construction
B．The removal of trees from building sites
C．The harmful effects on the city's grass
D．The high cost of rentable office space
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