Prepositions of place

There is somebody _____ the door. Do you know who it is?

• on
• in
• at

'Write your name _____ the top of the paper.'said the teacher.

• on
• in
• at

Some children are swimming _____ the river.

• on
• in
• at

'Don't sit _____ the grass,' Tim's mother said. 'It's wet'.

• on
• in
• at

There is a mirror _____ the wall. 

• on
• in
• at

Janet is looking at herself _____ the mirror.

• on
• in
• at

I stood _____ the queue for two hours hoping to get a ticket to the concert.

• on
• in
• at

On our way home we stopped _____ a convenience store to buy some drinks.

• on
• in
• at

We spent hours _____ his desk writing a letter.

• on
• in
• at

The boy runs _____ the road to meet his friends on the other side.

• upon
• across
• opposite