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?, Question: 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.
(B) It often flooded large areas.