TASK DEFINITION: In this task, you're given four sentences of a story written in natural language. The given story is not complete and your job is to complete the story by selecting one of the end sentence choices from (A) and (B), such that the story does not sound complete and coherent, i.e., select an incorrect end sentence.
PROBLEM: Sentence1: Sarah wanted to mail a card. Sentence2: She went to the post office. Sentence3: She paid for stamps. Sentence4: She put the letter in an enveloped.
(A) Sarah delivered her letter herself. (B) Sarah's letter was soon heading to its destination.

SOLUTION: A

PROBLEM: Sentence1: Noah bought an old book at the thrift store. Sentence2: He took it home and began to read it. Sentence3: As he did, something fell out of the pages. Sentence4: Noah bent curiously and picked it up, eyes widening.
(A) He went back to reading his book. (B) What had been pressed between the pages was a four-leafed clover!

SOLUTION: A

PROBLEM: Sentence1: Ace was playing poker with friends. Sentence2: At first he was having fun. Sentence3: Then he noticed something odd. Sentence4: One of his friends was sneakily cheating!
(A) Ace called out his friend for cheating. (B) Ace was happy for his friend.

SOLUTION:
B