问题描述：
it seems to some experts that there are only three commonly-used video websites in this area:
56.com,YOuku.com,Tudou.com,and they_____90% of the market.
A.make up B.put up C.set up D.take up
56.com,YOuku.com,Tudou.com,and they_____90% of the market.
A.make up B.put up C.set up D.take up
问题解答：
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