单项选择题

Why does the author give an example in the last paragraph

A．To show how a smuggler is caught.
B．To show a smuggler is afraid of the police.
C．To show to keep a wary eye on couriers is useless.
D．To show mules may keep the profit for themselves.

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单项选择题

After reading the article, one would refrain from concluding that ______.

A．optimism reigns in regard to getting Ph.D. dropouts to return to their pursuit of the degree
B．a Ph.D. dropout, by and large, does not have what it takes to learn the degree
C．colleges and universities employ a substantial number of Ph.
D．dropoutsD. Ph.D. s are not earning what they deserve in nonacademic positions

单项选择题

The sentence if he is blown in Par

A．1 is closest in meaning to "______".A. if he is arrestedB. if he is recognized, but not necessarily arrestedC. if he is recognized and arrestedD. if he runs away