单项选择题

Rivera's investigation and expose on the conditions at Willowbrook State School led to ______.

A．the public concern and request for changes
B．the improvement of the conditions there
C．a considerable increase in the school's budget
D．all of the above

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单项选择题

The main idea of this passage is that ______.

A．although rats are affected by overcrowding, people arc not
B．data from experiments indicate that overcrowding may be an important cause of social pathology
C．the social behavior of rats is seriously affected by overcrowding
D．Calhoun's experiments have influenced many people

单项选择题

Geraldo Rivera is working as a(n) ______.

A．news reporter for a newspaper in New York
B．investigative reporter for special TV programs
C．investigative officer of the New York government
D．philanthropist (慈善家) for the welfare of the mentally disabled