关于be to do的选择题

As a young man, he didn't know he ____ world fame later on.
A.will win B.was to win
C.shall win D.was about to win
为什么选B?分析下各项吧
D为什么不行？

be to do & be about to do的区别 be to do 的用法？ 几道关于will&be going to的选择题 to do与to be的区别 be use to do ,,,be worth to do ,,, be willing to do ,,,hope to do 的意思是什么??? 关于 be+形容词+enough to do sth what to do和how to do it的选择题 determine to do与be determined to do的区别 be going to和be going to do的区别？ will, be going to,be to do 的区别