单项选择题

In Africa, people in cities will be ______ by the end of the century.

A．almost twice as much as in 1985
B．doubled than that in 1985
C．over twice as much as in 1985
D．300 million
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单项选择题
It could logically be assumed that the author of this passage would support legislation to ______.
A．ban the use of all fertilizers
B．prevent the use of automobiles in the dries
C．build additional conventional power plants immediately
D．organize an agency to coordinate efforts to cope with environmental problems
单项选择题
The passage indicates that the conditions that led to overcrowded roads also brought about ______.
A．more attractive living conditions for many people
B．a healthier younger generation
C．greater occupational opportunities
D．the population explosion
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