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.
单项选择题 A knowledge of history （）us to deal with the vast range of problems confronting the con temporary world.
单项选择题 It took a lot of imagination to come up with such an（）plan.
