Put one suitable preposition to complete the sentence: He has a lot of Math books ... the bookshelf. She was ... home yesterday morning

He has a lot of Math books ..................... the bookshelf
She was ... home yesterday morning
They write ... their parents every weekend
She should buy some new furniture..................her living room
You must put all your clothes ....................... the wardrobe
Don't let children play.....................matches
There are some flowers .......... to the television
We should keep all dangerous objects out............. children's reach
There is a table and four chairs..............the middle of the kitchen
Young children often try to put anything..................electrical sockets