单项选择题

--I am not quite myself today.
-- ______ go and see a doctor

A．Why don't
B．Why not
C．Why you
D．Better to
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单项选择题
--Are you pleased with your work--Yes, it couldn't be ______.
A．any better
B．any worse
C．the best
D．the worst
单项选择题
It is difficult ______ a world record and even more difficult to ______ it.
A．keeping, set
B．keep, set
C．set, keep
D．to set, keep
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