Adjust the chair height so your elbows are about（ ）the work surf

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】：调整椅子的高度，使你的肘部和操作台保持大致相同的高度。表示“和......一样”：as+adj/adv原形+as; the same+名词+as.