(2015·安徽)A ship in harbor is safe, but that’s not _____________ ships are built

题干

(2015·安徽)A ship in harbor is safe, but that’s not _____________ ships are built for.

A．what	B．whom
C．why	D．when

上一题下一题 0.64难度单项选择更新时间:2018-10-08 11:03:07

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