--Where is the cat?

--It's ____ the box.

A.in　　 B. on　　 C.under

--Where is the boy?

--He is _____ the car.

A. in　　　　B. on　　　　C. under

--What is she going to do?

--She is going to get up ___ 7 o'clock.

A. to　　 B. on　　 C. at