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题型：单词拼写（单句） 题类：常考题 难易度：普通
牛津版（深圳•广州）2019-2020学年初中英语九年级上册Module 1 Unit 2 Great minds第1课时 Reading（1）
Cao Cao once wanted to know the {#blank#}1{#/blank#} of an elephant. His son Cao Chong came up with an idea. He asked people to lead the elephant onto a boat on a river and marked the water level. Then they took the elephant's place with rocks when the river water reached the same level. Finally, they {#blank#}2{#/blank#} all the rocks, so they knew how much the elephant could{#blank#}3{#/blank#} . How smart Cao Chong was!
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