He’s never late for school, _______ he —_______. He gets to school on timeevery day.

The man put out the cigarette when _______thatsmokingwasnotallowedonthetrain.

PSAs are often run for free, _____ to educate people about health, safety, or any other problem thataffects public welfare. [ ]

Will you give me a hand I have some trouble_______ the scientific problem.—Don’t worry. I’ll try my best to help you _______.

Can you guess if they ________tomorrow? —They will come if they ________free, Ithink.