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The math problem is _____ difficult that only _____ students can work it out.
A．too; a fewB．so; a fewC．so; a littleD．enough; little
B

試題分析：too太,也;so如此,這么;enough足夠的;a few幾個,修飾可數(shù)名詞復數(shù);a little一點,修飾不可數(shù)名詞;little一點,表示否定含義;句意:這道數(shù)學題有點難,以至于只有幾個學生能計算出來.結(jié)合語境可知選B.
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