题目内容
根据短文内容及所给提示,补全文中单词或用所给单词的正确形式填空
Mr. Brown likes biology. He enjoys exploring(探索) the1.(mystery) in nature. But many things are 2.(puzzle), indeed. He has three3.(grandchild). He often tells them stories and encourages them to pay a 4.to nature. Because nature is full of puzzles. He hopes they will be biologists when they g5.up.
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