Question : Select the most appropriate option to fill in the blank.
You'll be sick _______you stop eating.
Option 1: upto
Option 2: later
Option 3: until
Option 4: unless
Correct Answer: unless
Solution : The correct answer is option 4.
Explanation:
Until is a time-related verb that roughly translates to "before" and "up to" the time.
Unless is a preconditional phrase that means if this condition is not met.