◎ 题干

Explorer Robert Ballard searched the sunken ship---the Titanic for more than 20 years and also, with his cameras, he _____ the hole along the side of the ship which had caused it to fill with water and sink.
A.could findB.managed finding
C.succeeded to findD.was able to find
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◎ 解析
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◎ 知识点
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