The air has leaked out of this football Could you get it________up?[ ]

下列选项中划线词语的解释完全正确的一项是（ ）  

Lily didn’t come to the party last Sunday. ____，she would have made the party more exciting .

______ do you spell the word “box” —B-O-X.

If you want to learn more about this concept, you may _____ Professor Li’s paper.