I-----todotheworkby3o'clockthisafternoon.AwillhavebegunBwillbegineCwouldhavebegunDhavebegun该题的答案给的是A，可能是表示推测，可是语法中没有will+have+过去分词这种用法请帮助

Question

I----- to do the work by 3 o'clock this afternoon.
A will have begun B will begine
C would have begun D have begun
该题的答案给的是A，可能是表示推测，可是语法中没有will+have +过去分词这种用法请帮助

Answer 1

B.will begin
那可能是它给的答案错了,你相信我,肯定是选 B,A 是错的.如果用will的话,只能是,i will have to do the work by 3 o'clock this afternoon.