位置:首页 > 题库频道 > 学历类 > 升学考试 > 高中(高考) > 英语 > 高考英语介词和介词短语练习801

If his parents are convinced ______ the fact that his son always focuses his mind _______his study.  

发布时间:2021-07-24

A.of; on

B.of; at

C.by; to

D.on; at

试卷相关题目

返回顶部