题目内容：
Einstein’s theory of relativity seemed hard to believe at the time _____.
A.when he first introduced
B.that he first introduced it
C.he first introduced
D.which he first introduced it
参考答案：
答案解析：
选择题：Einstein’s theory of relativity seemed hard to believe at the time _____.
- 题目分类：军队文职人员招聘
- 题目类型：选择题
- 号外号外：注册会员即送体验阅读点！