I must say he reads very well，and I shouldn’t be surprised if he acting for a living one day.
A. had taken up
B. takes up
C. have taken up
D. would have taken up
网友回答
A. had taken up
(答案→)B. takes up
C. have taken up
D. would have taken up
解析：所给的四个选项中没有一个表示对未来的情况的虚拟的形式should+动词原形，或是were to do，因此可以断定if引导的条件句在这里最真实的条件句，用一般现在时表示一般将来时，故B是正确答案。