单项选择题

Grant was one of a body of men who were self-reliant ______, who cared hardly anything for the past but had a sharp eye for the future.

A．on themselves
B．on not making a fault
C．to a fault
D．to remain ahead
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单项选择题
No one would have time to read or listen to an account of everything ______ going on in the world.
A．it is
B．there is
C．as is
D．what is
单项选择题
It is a myth that the law permits the Food and Drug Administration to ignore requirements for ______ drugs while brand-name drugs still must meet these rigid tests.
A．specific
B．generic
C．intricate
D．acrid
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