1 . Most students are ______ (occupy) in preparing for the final exam. (所给词的适当形式填空)
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2 . ________ (忙于) with his work, he failed to turn up. (根据汉语提示单词拼写)
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3 . I have been so __________ (占用) with work that I haven’t had time for social activities. (根据汉语提示单词拼写)
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