【題目】The _______ of new inventions (發(fā)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:新發(fā)明的目的應(yīng)該使生活更好,不是更艱苦。 A. secrets秘密;B. rules規(guī)則;C. subjects科目;D. purposes目的。根據(jù)題意,故選D。

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