单项选择题

A．expand and improve the existing subway system.
B．build underground malls and parking lots.
C．prevent further land subsidence.
D．promote advanced technology.
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单项选择题
Which of the following statements is INCORRECT
A． Migration exerts a great impact on population change.
B． Migration contributes to mankind’’s progress.
C． Migration brings about desirable and undesirable effects.
D． Migration may not be accompanied by human conflicts.
单项选择题
According to the passage, which of the following is NOT the writer’’s opinion
A．Countries paid a heavy price for whichever measure taken.
B．Countries all found themselves in an economic dilemma.
C．Withdrawal of foreign capital resulted in the crisis.
D．Most governments shose one of the two options.
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