【题目】Hopefully in 2025 we will no longer be e-mailing each other, for we _______ more convenient electronic communication tools by then.
A. have developed B. had developed
C. will have developed D. developed
【答案】C
【解析】考查时态。句意：希望在2025年，我们不再互相发电子邮件，因为到那时候我们将开发出更方便的电子通信工具。根据时间状语in 2025，可知用将来时；再根据时间状语by then（到那时），可知用完成时。结合两者可知用将来完成时。故选C。
