TOEFL iBT Part 2 Listening Test(Pre-Test)
DIRECTIONS
You will demonstrate your ability to understand spoken English in academic settings. You will listen to a set of audio passages, consisting of 3 lectures and 2 conversations. After you hear each lecture or conversation, you will answer questions about it. In some questions, a portion of the lecture or conversation is replayed; you will listen to part of the recording again and then answer a question.
You may listen to each passage ONLY ONCE. You are allowed to take notes while you listen. Answer each question in sequential order; you will NOT be allowed to skip or go back to previous questions. You have no more than 35 seconds to answer each question.
DIRECTIONS
You will demonstrate your ability to understand spoken English in academic settings. You will listen to a set of audio passages, consisting of 3 lectures and 2 conversations. After you hear each lecture or conversation, you will answer questions about it. In some questions, a portion of the lecture or conversation is replayed; you will listen to part of the recording again and then answer a question.
You may listen to each passage ONLY ONCE. You are allowed to take notes while you listen. Answer each question in sequential order; you will NOT be allowed to skip or go back to previous questions. You have no more than 35 seconds to answer each question.

What does the professor imply about compression and extension?