了不起的比尔盖茨书籍:I am not sure( )he will come or not

I am not sure( )he will come or not I am not sure which restaurant ____. 11. I want to give a birthday party, but I am not sure _____. 1，I am sorry I am late for class。2，He is sorry that he did not do it yesterday。 I am sure I do!是什么意思 I am not twenty -- I hear Tom is coming to China. --- Yes, but I'm not sure if he _____(like) our school. He is so learned a man that I am sure it would be impossible to find his ___ i am not your girl wither i am going i know not