The past tense verb of per/for/ate is per/for/ated. An ulcer that has eaten a hole through the stomach wall is a ___________ / ___________/ ____________ ulcer. An ulcer may also _____________ /__________ /______________ (present tense verb) the stomach wall.
When ulcers make a hole in an organ, a ___________ /__________ /_________ (noun) is formed.
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