(2013·浙江，15)People develop preference for a particular style of learning at early age and these preferences affect learning.
A. a；an
B. a；/
C. /；the
D. the；an
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(答案→)A. a；an
B. a；/
C. /；the
D. the；an
解析：考查冠词。短语a preference for...意为“对……的偏好”；at an early age意为“在年纪很小时”，故均填不定冠词。