The problems of listening to a lecture could go on and on. There are a copious amount of different variables that take place when a lecture is being orally presented. “Is the lecture interesting?” “Who is presenting the lecture?” “Who’s in the audience?” So very often we find ourselves bored while listening to a lecture due to the sheer fact of the presenters voice. The only problem that occurs while listening to a lecture is the personality and preference of the one who is listening.
Answer:

Explanation:
Nancy only believes that her brother is in Paris. Even if he is in Paris or he is not, Nancy cannot know for sure.
I don't know but a long essay or dissertation is involving personal research, written by a candidate for a college degree.
A short story's setting is made of time and place.
Apart from plot (what is going on) and characters (who is doing what they are doing), the setting (where and when is the plot happening) is the most important element of a short story. The interpretation of a short story depends very much on how the author has described the setting. It provides a context for the events.