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1 . Before entering an office, you are supposed to ask for p________ . (n. the act of allowing sb to do sth) (根据英文提示单词拼写)
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2 . How dare he use my office without ________ (permit)? (所给词的适当形式填空)
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3 . It is necessary that students should ask for teachers’ _____________ (permit) before entering staffrooms. (所给词的适当形式填空)
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