Our test today has questions that are among the hardest you will ever face while studying for the Advanced HSK. They are also a routine part of the Chinese proficiency exam.In our opinion these find-the-mistake questions are challenging because they're open-ended. Each question consists of a simple sentence that contains a single error. This error might be grammatical, or maybe it involves a matter of word choice. All you need to do is find it. Then select the passage which contains it and move on. Good luck.