由于技术的非自愿扩散，促进了周围的技术和牛产力水平提高的现象是技术创新特征中的()

A.风险性

B.一体化与国际化

C.外部性

D.时问差异性

—I’ll come to attend your speech at 9:00 tomorrow morning.

—I’m sorry. By then my speech _________ and I __________ TV at home.

A．will end; will watch

B．is to end; will watch

C．will be ended; am going to watch

D．will have ended; will be watching