a written permission, he had to write another letter to the president of the university.A.

a written permission, he had to write another letter to the president of the university.
A. Not giving
B. Not having been given
C. Having not given
D. Having not been given

A. Not giving(答案→)B. Not having been givenC. Having not givenD. Having not been given解析：考查非谓语动词作状语。句意：因为没有给他一个书面的批准，他不得不另外写了一封信给大学校长。根据非谓语动词的否定，not应该置于非谓语之前，排除C和D，然后根据句意，give与he之间的关系为被动，确定答案为B.

感谢回答

如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！

点此我要举报以上问答信息