3. Put the verbs in brackets into -ing form or infinitive (with or without to)

{"1"=>"What you can **do** is just not to mind your business.", "2"=>"Frank has decided **to join** an organization", "3"=>"There is no point in **worrying** about it.", "4"=>"Let me **help** you with that heavy suitcase.", "5"=>"Brian was looking forward to **starting** his new job at the animal shelter."}