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【题目】The _______ of new inventions (发明) should be to make life easier, not to make it harder.
A.secrets
B.rules
C.subjects
D.Purposes

【答案】D
【解析】句意:新发明的目的应该使生活更好,不是更艰苦。 A. secrets秘密;B. rules规则;C. subjects科目;D. purposes目的。根据题意,故选D。

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