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Adjust the chair height so your elbows are about ______ the work surface.
A、 the same high as
B、 high as
C、 as higher as
D、 the same height as
【正确答案】：D
【题目解析】：该题考查的是as...as和the same as的用法。as+adj/adv+as，第一个as后接形容词或副词的原级。the same+名词+as，因此选项D为正确答案。