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
The main purpose of the passage is to ______.
A．compare skyscrapers with other modern structures
B．describe skyscrapers and their effect on the environment
C．advocate the use of masonry in the construction of skyscrapers
D．illustrate some architectural designs of skyscrapers
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.
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