A ship in harbor is safe, but that’s not ______ ships are built for. A. what B. whom C. why D. when
2022-11-01 14:09:36 33次 2015年全国普通高等学校招生统一考试英语（安徽卷解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
A ship in harbor is safe, but that’s not ______ ships are built for.
A. what B. whom C. why D. when
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