—What are you doing?

— I’m looking ___ the children. They should be back for lunch.

The teacher told the class to ____ their books.

They are going to have a crazy party ___ Christmas Eve.

Let’s walk over ____ the sun on the other side of street.

—What do you want to do ____ those old boxes?

— To put things in when I move to the new flat(一套房间).

John became a football coach in the Sealion Middle School ____ the beginning of March.

You can’t wear a blue jacket _____ that shirt. It will look terrible.

It was a pity that the great writer died ____ his work unfinished.

My uncle died ____ heart disease last summer.

Ryan made _____ his mind to study hard but he didn’t.

A. in    B/     C. on    D. up