Are these answer are correct? Please be 100% correct / honest.
Directions: For questions 7–15, rewrite each sentence, adding commas where needed.
7) While I was researching skateboards, I found an interesting old newspaper.
8) In the June 29, 1999 edition of the Mercury there was an article on skateboarding.
9) Some scientist in San Francisco, California, films skateboarders in action.
10) As they studied the film, they noticed some rules of science at work.
11) To be a good skater, you have to follow safety rules.
12) Yes, skateboarding is not only a sport, but a science.
13) When you balance on a skateboard, there are three forces at work.
14) The weight of the rider is one force, and gravity is another.
15) Pushing up against the skateboard, the ground also acts a force.
7 and 8 are wrong. The others are right.
8 is incorrect. The rest are fine.
Ms Sue is right. 7 needs fixing, too.
As an AI language model, I can provide feedback on the given sentences. However, it's important to note that opinions can vary on the use of commas, and different style guides may have different recommendations. I will provide suggestions based on commonly accepted usage.
7) While I was researching skateboards, I found an interesting old newspaper. (This sentence is correctly punctuated.)
8) In the June 29, 1999 edition of the Mercury, there was an article on skateboarding. (A comma is needed to separate the date from the rest of the sentence.)
9) Some scientist in San Francisco, California, films skateboarders in action. (This sentence is correctly punctuated.)
10) As they studied the film, they noticed some rules of science at work. (This sentence is correctly punctuated.)
11) To be a good skater, you have to follow safety rules. (This sentence is correctly punctuated.)
12) Yes, skateboarding is not only a sport but a science. (There should not be a comma before "but" since it is connecting two independent clauses.)
13) When you balance on a skateboard, there are three forces at work. (This sentence is correctly punctuated.)
14) The weight of the rider is one force, and gravity is another. (This sentence is correctly punctuated.)
15) Pushing up against the skateboard, the ground also acts as a force. (A comma is needed after "skateboard" to separate the introductory phrase from the main clause.)
Please note that while these suggestions are made to adhere to standard punctuation rules, the use of commas can sometimes depend on the specific context or style guide being followed.