单项选择题

Some felt that they were hurrying into an epoch of unprecedented enlightenment, in which better education and beneficial technology would （）wealth and leisure for all.

A．maintain
B．ensure
C．certify
D．console

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单项选择题
Located in Washington D. C. , the Library of Congress contains an impressive （）of books on every conceivable subject.

A．flock
B．configuration
C．pile
D．array
单项选择题
Too often Dr. Johnson's lectures （）how to protect the doctor rather than how to cure the patient.

A．look to
B．dwell on
C．permeate into
D．shrug off
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