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An engineer has designed _______ robot that can work in _______ deep sea to clean waste.
A.a; theB.a; aC./; theD.the; /
A
这题考查冠词;第一空填a,泛指“一个机器人”,第二空填the,特指“在深海”,句意是:一个工程师发明的一个机器人可以在深海工作清除废物的。选A。
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