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【单选题】
Before the conference, a new problem came up __________ could speak on behalf of our group.A.
that
B.
who
C.
which
D.
how
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【简答题】五味子的有效成分
【单选题】The question was so unexpected that, for a moment, Arthur was ______ a loss how to reply to it.
A.
at
B.
in
C.
on
D.
of
【单选题】The question was so ________ that there was a ________ expression on the teacher's face.
A.
puzzled; puzzling
B.
puzzled; puzzled
C.
puzzling; puzzled
D.
puzzling; puzzling
【单选题】The question was so difficult that the pupils didn't know how to __it.
A.
do
B.
deal
C.
manage
D.
tackle
【单选题】The question was so difficult that （） people could answer it.
A.
little
B.
afew
C.
few
【单选题】The question was so unexpected that I was ________for a moment.
A.
on balance
B.
out of balance
C.
in the balance
D.
off balance
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