There has been an error in the display of this page. There has been an error in the display of this page. Click on an exercise title to enter the exercise page. Introduction to the CAT in Reading  Main Idea Exercises Exercise 1: Identifying the main idea of a reading passage Exercise 2: Identifying the main idea of a reading passage Exercise 3: Determining the main idea of a passage  Referring Questions  Inferring Questions  Vocabulary Exercises Test What You Have Learned There has been an error in the display of this page.