Exercise 3: Consultations-Professors/Students.
In some consultations in the listening section on the Paper-Based TOEFL or the Computer-Based TOEFL, you will be asked to recall information from conversations between professors and students about classroom content or policies. Choose the best answer.QUESTION:
1. What are the purpose of this consultation?
(A). To discuss the results of the lab experiment?
(B). To answer the student's questions about the lap experiment.
(C). To explain the method of collection by water displacement.
(D). To prepare the students to do the lap experiment.
AUDIO:
Narrator: Listen to part of a consultation in a professor's office.
Smith: You wanted to talk about a results of your laboratory experiment. Did you have any problems with it?
Bob: Yes, Professor Smith. We did.
Smith: And you two are lab partners?
Bob: Yes, we are.
Smith: Well, then, can you go over the procedure for me?
Anne: Sure. First we put ten grams of crushed limestone in a bottle.
Smith: Anything special about the bottle?
Bob: It was a gas-collecting bottle with a one-hole stopper and bent glass tubing.
Smith: Very good. So you put the limestone in a gas-collecting bottle. Then what?
Anne: Then we poured in ten milligrams of hydrochloric acid, put on the stopper, and collected a bottle of carbon dioxide.
Smith: Right. What was the method of collection?
Anne: Water displacement.
Smith: Good.
Anne: Then, Then, we lit a magnesium ribbon and put it in the bottle of carbon dioxide.
Bob: And carbon deposits began to form on the bottom of the bottle. You see, We didn't have any problem with procedure...
Anne: Well, we had a little problem getting the magnesium ribbon to stay lit until we could get it into bottle.
Bob: Okay. But we did it. The big problem was that we really didn't understand what happened. Did magnesium combine with the oxygen in the carbon dioxide?
Smith: You have just answered your own question, Bob. The burning magnesium broke the carbon-oxygen bonds in the carbon dioxide, and then the oxygen combined magnesium to produce magnesium oxide.
Anne: And the carbon was freed to deposit itself on the bottle.
Smith: Exactly.
AUDIO:
1. What is the purpose of this consultation?
ANSWER:
(A)"Let's talk about the results of your laboratory experiment".
Choice: (B) and (C) are mentioned as secondary themes that are used to develop the theme of the discussion, "the result of the lab experiment".
Choice: (D) is not correct because the student had already done the lab experiment.
QUESTION:
2. What was deposited on the bottom of the gas bottle?
(A). Magnesium.
(B). Limestone.
(C). Carbon.
(D). water.
AUDIO:
2. What was deposited on the bottom of the gas bottle?
ANSWER:
(C)"And carbon deposits began to form on the bottom on the bottle."
Choice: (A) refer to the ribbon that was lit, not to the deposits.
Choice: (B) refer to the material that was put in the bottle at the beginning of the experiment, not to what was deposited at the end.
Choice: (D) Refer to the method of collection, water displacement.
QUESTION:
3. What caused the deposits?
(A). The hydrochloric acid broke the carbon bonds in the carbon dioxide.
(B). The magnesium oxide broke the carbon-oxygen bonds in the carbon dioxide.
(C). The burning magnesium broke the carbon-oxygen bonds in the carbon dioxide.
(D). The gas collection method broke the carbon-oxygen bonds in the carbon dioxide.
AUDIO:
3. What caused the deposits?
ANSWER:
(C) " The burning magnesium broke the carbon-oxygen bonds in carbon dioxide, and then the oxygen combined with the magnesium oxide".
Choice: (A), (B) and (D) are not correct because burning magnesium broke the carbon -oxygen bonds.
QUESTION:
4. Where does this consultation take place?
(A). In the lab.
(B). In the classroom.
(C). In the hallway.
(D). In the professor Smith's office.
AUDIO:
4. Where does this consultation take place?
ANSWER:
(D)" Listen to part of a consultation in a professor's office".
The lab in Choice: (A) refer to the place where the experiment took place, not to where the conversation taking place.
Choice: (B) and (C) are not mentioned and may not be concluded from information in this consultation.
QUESTION:
5. What can we infer from this consultation?
(A). Bob does not get along with his lab partner.
(B). The students performed the experiment correctly.
(C). The students had problems and could not the lab experiment.
(D). There was a fire in the lab during the experiment.
AUDIO:
5. what can we infer from this consultation?
ANSWER:
(B) Since the students are able to explain the procedures for the experiment, it may be concluded that they performed the experiment correctly.
Choice: (C) is not correct because in spite of a little problem, the students completed the experiment.
Choice: (D) refer to the fact that there is burning magnesium, not a fire in the lab.
Choice: (A) is not mentioned and may not be concluded from information in the discussion.