【題目】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】

試題分析：A. rules 規(guī)則；B. subjects科目；C. secrets秘密；D. purposes目的。句意：新發(fā)明的目的應(yīng)該是使生活更容易而不是更難。根據(jù)句意選D.

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