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【题目】The ______ of new inventions should be to make life easier, not to make it harder.

A. rules B. subjects C. secrets D. purposes

【答案】D

【解析】

试题分析:A. rules 规则;B. subjects科目;C. secrets秘密;D. purposes目的。句意:新发明的目的应该是使生活更容易而不是更难。根据句意选D.

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