1 . The school sports meeting is held ___________ (annual). (所给词的适当形式填空)
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2 . A________ (每年), the world generates 1.3 billion tons of solid waste. (根据中英文提示填空)
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3 . The English speech contest started by our former headmaster is held ________ (annual) in our school. (所给词的适当形式填空)
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