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He is in charge of the _______________ of materials.
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Which of the following materials is not appropriate for a teacher to use in listening practice?
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Although he is in financial difficulties, he is _______ to accept my offer of the loan of twenty tho
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He is the only one of the sons in the family who______received high education.
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g of the ship can immediately be placed in the ____ of operation when notified that the ship is in c