单项选择题

Terrorists have obviously taken advantage of______.

A．the legal privileges granted to foreigners.
B．the excessive hospitality of the American people.
C．the irresponsibility of the officials at border checkpoints.
D．the low efficiency of the Immigration and Naturalization Service.

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单项选择题

It is believed by many that all these years the INS ______.

A．has been serving two contradictory functions.
B．has been too liberal in granting visas to tourists and immigrants indiscriminately.
C．has over-emphasized its service functions at the expense of the nation's security.
D．has ignored the pleas of the two powerful lobbies.

单项选择题

Before Sept 11, the U.S. Congress had been unable to pass stricter immigration laws be- cause______.

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 nation.
D．resources were not available for their enforcement.