Help the amateur chef apologize to their roommate. Choose the correct word to complete the sentence.

I know I _____ a terrible mistake when I tried to cook fish in the toaster.

The correct answer is made.

In English, we use the verb make (not do) with the word mistake. Since the action happened in the past, we use the past tense made. As a general rule, "make" is used when we create or produce something that wasn't there before—even if it's a very bad idea!