问题
选择题
He was ______ medical student before he turned _______ engineer.
A．a; an
B．the; the
C．a; /
D．/; an
答案
答案：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。
搜题请搜索小程序“爱下问搜题”
He was ______ medical student before he turned _______ engineer.
A．a; an
B．the; the
C．a; /
D．/; an
答案：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。