单项选择题

Professor McDonald's______ knowledge on this subject resulted in his authority in this academic field.

A．extensive
B．excessive
C．expensive
D．intensive
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单项选择题
According to the latest survey, George W. Bush Jr. doesn't have a chance to win the re election. Almost all of the people in the country vote for his______.
A．candidate
B．opponent
C．alternative
D．enemy
单项选择题
The old woman was______ from the intensive care unit last week and transferred to a general ward.
A．dismissed
B．discharged
C．discarded
D．distinguished
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