题目内容
He was ______ medical student before he turned _______ engineer.
| A.a; an | B.the; the | C.a; / | D./; an |
C
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。
练习册系列答案
相关题目
题目内容
| A.a; an | B.the; the | C.a; / | D./; an |