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【题目】We have a r__________ to make sure this never happens again.

【答案】responsibility

【解析】

句意:我们有责任确保这种情况不再发生。

考查名词。此处有不定冠词a,可知此处填写名词。根据后半句“to make sure this never happens again.”确保这种事不会再发生。可知这是“我们的责任”。responsibility名词,责任。故填responsibility

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