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

【答案】responsibility

【解析】

句意：我們有責任確保這種情況不再發(fā)生。

考查名詞。此處有不定冠詞a，可知此處填寫名詞。根據(jù)后半句“to make sure this never happens again.”確保這種事不會再發(fā)生。可知這是“我們的責任”。responsibility名詞，責任。故填responsibility。

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