【題目】The ______ of new inventions(發(fā)明) should be to make life easier, not to make it more difficult.

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

【答案】D

【解析】句意：新發(fā)明的目的應(yīng)該是使生活更容易，而不是使它更困難。A. rules 規(guī)則；B. subjects主題；C. secrets機密；D. purposes目的。結(jié)合句意可知，答案為D。

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