The key answer of exercise 4

a)

The police (A) phoning someone at a security company (B) to check a crime / security breach / robbery.

Possible questions in A's part of the conversation:

1. Did the security guard see anything?
2. How long do you usually keep the footage / videos?
3. Can you send me the footage / film / videos?

b)

I wanted to know if the security guard had seen anything. Mrs jones replied that he hadn't and that he must have fallen asleep during the period in question. She suggested checking the security camera footage. I enquired how long the security footage was kept / they kept the security footage. Mrs Jones answered that they'd usually keep / they usually kept everything for one week before it was deleted. I asked her to send me the footage / film / videos and she agreed / offered to send them straightaway.