When you choose prepositions after the phrase "get good grades," <br/><br/>1. Which would you choose? Both are acceptable? <br/>(1) I got good grades in math.<br/>(2) I got good grades on math. <br/><br/>2. What about the following example? <br/>(1) I got good grades in a math exam. <br/>(2) got good grades on a math exam.