Part 1. 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.
Part 2. Example
Sentence1: Rick grew up in a troubled household. Sentence2: He never found good support in family, and turned to gangs. Sentence3: It wasn't long before Rick got shot in a robbery. Sentence4: The incident caused him to turn a new leaf. 
 (A) He is happy now. (B) He joined a gang.
Answer: B
Explanation: As mentioned in fourth sentence, the incident turned a new leaf to Rick's life; so, he must be happy now. Also, he was previously in gang, so, this incident cannot make him to join a gang. So, B is incorrect.
Part 3. Exercise
Sentence1: I am a different person than I used to be. Sentence2: I used to be heavyset but I lost weight. Sentence3: I took up swimming and lost the weight. Sentence4: I worked out three times week and ate healthy every day. 
 (A) I am much healthier now. (B) I am 300 pounds.
Answer:
B