The headmaster was dismissed three months ago.The post is too important to leave any longer,especially before the college entrance examination.
A. alone
B. away
C. vacant
D. occupied
网友回答
A. alone
B. away
(答案→)C. vacant
D. occupied
解析：vacant空缺的,空白的；occupied占据的。意思是这个职务太重要以至于不能空缺。