My laptop was resting safely ____ the desk.

I was standing ____ the elevator earlier today before work. 

Why did he put his coffee ___ the car before leaving for work? 

I need to study more to gain a better understanding ____ prepositions! 

He gathered the ingredients _____ the recipe. 

Alice needed to know which prepositions to master so she could feel more confident ____ speaking English. 

Which parts ___ the class were difficult to understand? 

He considered himself a master____ chess. 

He needed to look in the room ____ the steps. 

Why was the cat sitting ___ the table?