I believe that I to the modern life in New York by the end of next month.A. will have ada

问题补充：

I believe that I to the modern life in New York by the end of next month.

A. will have adapted

B. have adapted

C. adapt

D. will adapt

答案：

(答案→)A. will have adapted

B. have adapted

C. adapt

D. will adapt

解析：根据句末by the end of next month.时间状语，这是表将来的时间，故排除BC。如果时间状语是next month那么答案就选D，will have done是将来完成时，表示将来某个时间之前已经完成的动作。by the end of next month“在下个月末之前”，故选A