单项选择题

We learn from the passage that coordinated efforts will be made by various U.S. government agencies to ______.

A．refuse the renewing of expired visas.
B．ward off terrorist suspects at the border.
C．prevent the forgery of immigration papers.
D．limit the number of immigrants to the U. S.

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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

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.