题目内容：
_______a written permission, he had to write another letter to the president of the university.（ ）
参考答案：
答案解析：
单选题：_______a written permission, he had to write another letter
- 题目分类：英语
- 题目类型：单选题
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Don't give up regardless of difficulty and failure, _______
Don't give up regardless of difficulty and failure, _______ you'll never achieve
From Paragraph 3, we learn that
From Paragraph 3, we learn that
In Paragraph two, the underlined sentence means that________
In Paragraph two, the underlined sentence means that__________.（ ）
You want to watch the new play with your parents, so it will
You want to watch the new play with your parents, so it will cost you __________
资源共享包括硬件资源、软件资源和数据资源的共享。（ ）
资源共享包括硬件资源、软件资源和数据资源的共享。（ ）