单项选择题

In the long run, English learning, difficult as it is, is ______ to a learner iii his or her career devel- opment.

A．profitable
B．advantageous
C．prominent
D．rewarding
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单项选择题
From ,the moment of his birth the ______ into which he is born shape his experience and behavior.
A．habits
B．practices
C．customs
D．conventions
单项选择题
In the past decade skyscrapers have developed ______ in this newly emerging city.
A．homogeneously
B．simultaneously
C．spontaneously
D．anonymously
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