Answer:
1. My aunt has lived in Miami, Florida since July.
2. Tim had jury duty last month; he did not get assigned to a case.
3. The class will begin on Saturday, December 15th, 2021 at 6 p.m.
4. Martha said: "My sister is coming for a visit soon."
5. Yesterday Nicholas Cage, the popular actor, was interviewed on television.
6. The Joneses will visit Rome, London, and Paris during their European tour
7. The concert was sold out last week. Therefore; we had to choose another.
8. I know, Leila, that your essay is on my desk
9. If you want, Karen, you can turn the essay in on Tuesday.
10. "I told you several times" - said the clerk - "that this item is not on sale!"
Step-by-step explanation: 1. Commas are not used before "since" when It's a preposition of time. 2. A semicolon is used to separate two main clauses. 3. When we talk about dates, we use "th" and a comma after it. 4. We add quotation marks when we use direct speech. 5. We add commas in non-defining clauses to add more information in the middle of the sentence. 6. In American English, we use a comma before "and". 7. To use the adverb "Therefore" we need to use a semicolon. 8. We use a comma before and after calling a name in the middle of a sentence. 9.(Same case as in number 8). 10. Direct speech is separated from the narrator's words with quotation marks and dashes.