题目内容
An engineer has designed _______ robot that can work in _______ deep sea to clean waste.
A.a; the | B.a; a | C./; the | D.the; / |
A
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题目内容
An engineer has designed _______ robot that can work in _______ deep sea to clean waste.
A.a; the | B.a; a | C./; the | D.the; / |
A
解析