单项选择题


A．application
B．usage
C．use
D．utility
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单项选择题
A．gettingB．puttingC．fallingD．sitting
A．getting
B．putting
C．falling
D．sitting
单项选择题
Before Sept. 11, the U.S. Congress had been unable to pass stricter immigration laws because.
A．they might have kept away foreign students and cheap labor
B．it was difficult to coordinate the efforts of the congressmen
C．education and business circles cared little about national security
D．resources were not available for their enforcement
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