perseverance,expanse,stifle,weary,writhe,premises

1.In order to meet their goals,Olympic hopefuls require persistence as they train and(perserance) in the face of obstacles.
2.Readers must leave library(expanse)by the stated closing time unless permissions for after hour access has been granted.
3.Beneath his withdrawn and (weary)exterior,Collin was compassionate and affectionate.
4.Nothing stirred over the vast(premises)of grassland,except pair lionesses, which roared loudly from rock behind us.
Please check it and give me right answer.

1 answer

2 and 4 are wrong.