(2013·辽宁五校协作体二模) I can't say which type of tea tastes better. It's just a(n) of personal preference.
A. affair
B. problem
C. variety
D. matter
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A. affair
B. problem
C. variety
(答案→)D. matter
解析：选D 考查名词辨析。句意：我不能说哪种类型的茶口味更好。这只是个人口味的问题。It's just a matter of ...“这只是……的问题”，符合句意。