Complete sentences 1-6 with the words below . blackmailers burglars

Complete sentences 1-6 with the words below .
blackmailers burglars kidnappers muggers serial killers shoplifters
When i was a little kid , I used to belive that .
1 _ were very strong people who picked up shops .
2 _ were people who stole burgers .
3 _ were people who hit you on the head with a mug .
4 _ were people who sent black envelopes to people .
5 _ were murderers who put polson in breakfast cereals .
6 _ were people who would catch kids and force them to take a nap /