Tham khảo tài liệu 'the official guide to the toefl ibt third edition part 56', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | TOEFL iBT Practice Test 2 Listen to Audio Track 46. Questions 12. What is the lecture mainly about O How dolphins produce the sounds they make O How dolphins teach their young to identify signature whistles O The professor s experience with dolphins on a research boat O Various ways dolphins communicate with one another 13. According to a theory the professor mentions why do dolphins travel side by side O To view each other s bubble streams O To hear each other s signature whistles O To avoid interfering with other dolphins sonar clicks O To keep mothers close to their young 14. What does the professor imply about bubble streams O They help protect dolphins from predators. O Their function is similar to that of signature whistles. O They do not appear to serve a communicative function. O Dolphins use them to sense the movement of the water. 376 Listening 15. Why does the professor mention the time she spent on a boat doing research O To encourage students to do field work O To inform students about a paper she wrote O To show how scientists collect data on marine life O To illustrate that dolphins are difficult to locate Q Play 16. Listen again to part of the lecture by playing Track 47. a ho Then answer the question. What does this example illustrate O The differences between land and marine mammals O The importance of burst pulses as a way dolphins communicate O One reason dolphins travel in large groups O One way dolphins use signature whistles GO ON TO THE NEXT PAGE g 377 TOEFL iBT Practice Test 2 Q . . . . y Listen to Audio Track 48. Audio Questions 17. Why does the student go to Professor Kirk s office O To find out if he needs to take a certain class to graduate O To respond to Professor Kirk s invitation O To ask Professor Kirk to be his advisor O To ask Professor Kirk to sign a form 18. Why is the woman surprised at the man s request O He has not tried to sign up for Introduction to Biology at the registrar s office. O He has waited until his senior year .
