Answer:
о Have you ever noticed that many great conversationalists do not talk as much as they listen?
о If you are really interested in gaining energy, you must vigorously spend what you have.
о History is a subject about the past.
о Our school closes during snowstorms.
Step-by-step explanation:
A well-written topic sentence should easily inform readers what the other paragraph of a sentence is about.
Hence, we could notice that each of those sentences gives the reader insight into what to expect from the other paragraph.
For example, the one that says, "History is a subject about the past," tells the reader to expect other sentences in the paragraph would be to supportive of this claim.