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  • 1. (2024九下·龙湾开学考)  A. 用方框中所给单词的适当形式填空。每词限用一次。

    cost  during  success  enjoy  they

    A company in the USA is there to help these dolphins. The scientists in this company solve this problem very . They have made robot dolphins. The robot dolphins not only look like real ones but also move like real ones. a test a week ago, people thought they were real dolphins. "The robot dolphins can swim and dive by , people can also see something when they watch them. " A worker in the company said.

    One robot dolphin  about $27 million. Now, an aquarium in China is thinking about using them instead of real dolphins. 

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