In this task, you will be shown a conversation. You need to write a question with three choices for the conversation. Your question should be answerable based on the conversation and only have one correct answer. Note that you don't need to answer your question. "W" and "M" in the conversations stand for "woman" and "man".

W: Are there any long rivers in Africa? M: Yes, for example, the River Nile is the longest fiver in the world. W: Is it Egypt? I hear that it used to flood large areas. What about it today? M: In order to control the flood and make electricity, people built the Aswan High Dam on the river. W: Then it is another interesting place, isn't it?
What do you know about the River Nile? (A) It's the largest river in the world. (B) It often flooded large areas. (C) It's the second longest river in the world.

M: How often do you come back home? F: Um... usually... twice a year.
What are they talking about? (A) How often the woman come back home. (B) How soon the woman come back home. (C) Whether the woman come back home.

M: Hello, I'm a senior student. Could you tell me whether this reference room is only for faculty members? W: No, it's a also open to the postgraduates; and undergraduates can come too if they're got professors' written permission.
Can the man study in the reference room? (A) Yes, but he needs the approval by his professor. (B) Yes, he can study there if he is writing a research paper. (C) Yes, because he is a senior student.