By the end of this year he ______for thirty years.选项:a、will actb、has actedc、had actedd、will have been acting
问题描述：
By the end of this year he ______for thirty years.
选项:
a、will act
b、has acted
c、had acted
d、will have been acting
答
d
答
C
过去完成时、
答
d、will have been acting
到今年底,他就将演了三十年了.
有BY 很明显的完成时句子.
又因为没到年底,还有将来时,就是将来完成时了.
知识在于点滴积累,更在于不懈努力.
——另外,正在冲采纳率,请记得采用,