Do not view the questions until after you have listened to the audio file. Reading the questions first will not help you improve your English listening skills.
If you are uncertain about the answers to the questions, listen to the audio file again after having read the questions. After you have made all your selections, you may view the answers to see how you did.
You should read the Conversation Dialog to help you study after going through the listening lesson. Do not view the Conversation Dialog prior to listening to the audio, or prior to answering all the questions.