In 23-3 quiz, It was so hard for me. I didn’t even understand the point of that quiz. It was really hard. It was about Pronoun reference. But after I made research, I realized what the quiz was about. So, the pronoun reference is words to define the pronoun clearly. such as it, they, that, those, this, etc. For example, take the phone out of the car and fix it. So, If read this example you won’t be able to know which item should be fixed. Because it has two possible item: car and the phone. So, the answer is not clear. to make it clear just use car or the radio and the end of the sentence.