If or unless exercise multiple choice - Adverb exercises

Choose the correct word to complete the sentences.
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I will buy you dessert _____ you do something for me.
unless
if
They would mutiny _____ they were not.
unless
if
No image will be used _____ you leave the front page blank.
if
unless
The legislation will be permanent _____ it is amended or revoked in the future.
if
unless
The man will drown _____ he accepts the lifebelt thrown to him.
if
unless
I think he would appreciate it _____ I read it now.
unless
if
You will be arrested and detained _____ you cross here.
if
unless
I will be happy _____ we do.
unless
if
I will find out _____ you are telling the truth.
unless
if
The small businesses in the small countries will go bankrupt _____ they lose money repeatedly.
unless
if