There is nothing in the box.(改为同义句)

There is nothing in the box.(改为同义句)
1.There is nothing in the box（改为同义句）
There is _____ ______in the box.
2.Sally is often late ____(介词) school.
3.I have to go _____（介词）bed by 9:00 p.m.
拜托了,答得好后面可以补加5分