单项选择题
The problem has been（）my mind all day.
A. preying on
B. getting at
C. taking on
D. seeing to
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相关考题
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单项选择题
I want to（）a slightly different issue which is related to Anna's question earlier about our different meanings of open-ended problems.
A. bring up
B. bring about
C. bring forward
D. bring out -
单项选择题
Sometimes（）matters may result in surprising large effects.
A. predictable
B. big
C. trivial
D. imaginable -
单项选择题
A knowledge of history （）us to deal with the vast range of problems confronting the con temporary world.
A. equips
B. provides
C. offers
D. satisfies
