It is certain whether he will win the game.(whether应改为that)

It is certain whether he will win the game.(whether应改为that) It is ________ that he will win the game at last.certain B.s It is not certain whether he will come. It is unknown that whether the 2016 Olympic Game will be hel It is certain that he will win the match.这句话中的that可以省略吗 主语从句中 that表什么 如 It is certain that he will win the match. It is ( ) that Alison will win the game.He is the strongest It isn't quite certain that their team will win the game thi It ——（仍然是）to be seen whether will win in the game this after It is certain that he will come.这个句子改为was certain that he wo it's not whether you win or lose,it's how you play the game. he will win the match that is certain这句话语法对吗?不胜感激