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[单选题]
There is an urgent need for a()reform of our tax system.
A.radical
B.moderate
C.nominal
D.legitimate
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A.radical
B.moderate
C.nominal
D.legitimate
The energy companies ______ urgent studies of the Arctic environment.
A.made
B.put
C.moved
D.launched
A.be
B.is
C.are
D.was
It is extremely urgent that they ______ from the mountain before dark.
A.must be rescued
B.should rescue
C.can be rescued
D.be rescued
A.pay
B.ship
C.insure
D.pack
How long do you think ______ to finish this urgent task?
A.did it take you
B.it will take you
C.will it take you
D.it to take you
A.be arranged
B.will be arranged
C.must be arranged
D.would be arranged