He is so tall that he can play basketball.（同义句）
__He is tall enough to play basketball ______________________________
He is so short that he can't play baskerball.（同义句）
__________He is too short to play basketball______________________
Blindness affects about 45 millions people around the word.(对about 45 millions 划线提问）
______How many people do blindness affect around the world?__________________________
I am used to having lunch at 12 o'clock.(以since 3 years ago 改写)
I have been used to having lunch at 12 o'clock since 3 years ago __________________________
He used to walk to school.(对 walk to school 划线提问）
____What did he use to do____________________________
My friend has been away from Donghai for 3 yeas .(改为同义句）
It __is / has been _ 3 yeas since___ my friend __left___ Donghai