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根据汉语提示完成单词。 1. The man gave a lot of money to a medical _______ (研究). 2. He _______(栓) his horse to a tree by the road just now. 3. People get _______ (紧张) when they go to work the first time. 4. Our teacher asks me to give a _______ (演讲) next Monday. 5. We hope your children grow happily and _______(健康).