Entering a teacher's office or any office with a closed door without knocking first is not acceptable.
事先不敲门而进入老师办公室或者其他关着门的办公室,也是不允许的。
It's a shame to say it again, but I did tell a lie when questioned last time in my teacher's office.
再说起这件事真让人羞愧,但是我上次在老师办公室被问到的时候确实撒了谎。
There is a heterogeneous mass of papers in the teacher's office.
老师的办公室里堆满了大批不同的论文。
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