TASK DEFINITION: In this task, you are given a sentence. You must judge whether a single noun or verb has been replaced with another word with the same part of speech. The inversion would result in the sentence sounding unnatural, So unnatural sentences will be considered changed. Label the instances as "Original" or "Changed" based on your judgment.
PROBLEM: She hadn 't had time to marvel over it then , but she couldn 't help but do so now .

SOLUTION: Original

PROBLEM: I tuck the diary under my arm and flex my hands in surrender before she knocks the lamp over my skull .

SOLUTION: Original

PROBLEM: You should have been taking classes in aerospace engineering and computer programming . "

SOLUTION:
Original