【題目】Hopefully in 2030 we will no longer be e-mailing each other, for we more convenient electronic communication tools by then.

A.have developedB.developed

C.will have developedD.had developed

【答案】C

【解析】

考查時態(tài)。句意：希望在2030年，我們不再互相發(fā)電子郵件，因為到那時候我們將開發(fā)出更方便的電子通信工具。根據(jù)時間狀語in 2030可知，此處應用將來時；再根據(jù)時間狀語by then（到那時），可知應用完成時。結合兩者可知用將來完成時。故選C。

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