By the end of next month I ______ here for five years.

By the end of next month I ______ here for five years.
A、will work
B、have been working
C、have worked
D、will have worked
【正确答案】：D
【题目解析】：本题考查将来完成时的用法。注意本题的解题关键是By the end of next month，所以要用将来完成时。