根据首字母填空

根据首字母填空
1、Look at the boy.He is s_____ enough to lift that heavy box.
单项选择
2、——______does he know his best friend
A What B Who C How well D How many
3、I don't know when we'll leave here.(改同义句）
I don't konw ______ _____ leave here.
4、因为那次车祸,那个男孩失去了双腿.
The boy ______ his legs ______ ______ that car accident.