To commemorate the importance of Detective Stories throughout English literary history, the CWA (Crime Writers’ Association) is holding a contest to bring life to detective stories.

They are looking for young talents just like you.

You will therefore have to write a short detective play in groups of 4. 

This/These : This is used for objects that are close (physically or in time) to the person speaking or to introduce something new to someone

That/Those : That is used for objects that are away from the person speaking or that both speakers have knowledge of. It also be used to emphasise something