The　　　ofnewinventionsshouldbetomakelifeeasier,nottomake...

問題詳情：

The 　　　 of new inventions should be to make life easier, not to make it harder.

          A. rules                                         B. subjects   

          C. secrets                                         D. purposes

【回答】

D

知識點：名詞

題型：選擇題