The key to exercise solutions in chapter 5c - Grammar in use for the textbook On Screen B1+/B2 - Student's Book with authors Virginia Evans and Jenny Dooley from Express Publishing
Question
Change the sentences into the causative form.
Answer
I am going to have a security camera installed.
Mary has her post and newspapers collected by her neighbour whenever she's away.
The detective will have fingerprints taken from the crime scene by an expect.
The president has his family protected by body guards.