This is practice for the TOEFL speaking section, question number 6.
Listen to a lecture and answer the narrator's question at the end.
(This one is a little more difficult than the TOEFL level.)
Narrator: Explain the risks of MRIs and the role of contrast agents in improving images.
Preparation Time: 20 Seconds
Response Time: 60 Seconds
To see the text (which you will not on the actual test) go to:
http://sites.google.com/site/japaneseenglishclasses/toefl/toefl-speaking-section-quesion-6/toefl-speaking-section-question-6