He was medical student before he turned engineer.A. a; anB. the; theC. a; /D. /; an

发布时间：2020-08-15 00:25:27

He was      medical student before he turned      engineer.
A. a; an
B. the; the
C. a; /
D. /; an

网友回答

A. a; an
B. the; the
(答案→)C. a; /
D. /; an
解析：第一空表示一的概念，后一空前用了连系动词turn，所以名词前不用冠词。
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