Agirl out
9. which choice has no errors in punctuation? (points : 3)
she took a deep breath, closed her eyes, and stepped off the high diving board.
toby designed the set ruby made the puppets, and i wrote the story.
frankly, i thought the story was boring silly, and a complete waste of time.
josh put hay grain, and containers of water in the truck.
question 10. 10. which choice has no errors in punctuation? (points : 3)
she had bought a frame for the photograph, but the frame was too big.
tina hadn’t practiced all week yet she played beautifully.
the driver may have taken a wrong turn or he may have been delayed.
they had met when they were four so they had known each other for 30 years.
question 11. 11. which choice has no errors in punctuation? (points : 3)
the bright, colorful curtains let in plenty of light.
you can clean your room rake the yard or me with the car.
underneath the rug in the front room, was the entrance to the basement.
while the pizza was baking we checked the mail.

9. Correct: She took a deep breath, closed her eyes, and stepped off the high diving board.

The other 3 corrected below. Each of these are making a list, and a list needs comma between each item.

a. Toby designed the set [comma here] Ruby made the puppets, and I wrote the story.
b. Frankly, I thought the story was boring [comma here] silly, and a complete waste of time.
c. Josh put hay [comma here] grain, and containers of water in the truck.

10. Correct: She had bought a frame for the photograph, but the frame was too big. 

a. Tina hadn’t practiced all week [comma] yet she played beautifully. - This transitions a thought. 
b. The driver may have taken a wrong turn [comma] or he may have been delayed. - List
c. They had met when they were four [comma] so they had known each other for 30 years. - Transition. 

11. Correct: The bright, colorful curtains let in plenty of light. 

a. You can clean your room [comma] rake the yard [comma] or help me with the car. - List
b. Underneath the rug [comma] in the front room, [I think this is an incorrect comma, but I'm not sure.] was the entrance to the basement. - Transition
c. While the pizza was baking [comma] we checked the mail. - Transition

A good rule of thumb for commas is whenever you say the sentence outloud, any time you pause slightly, you will generally use a comma when writing. 

Reasons to use a comma: 

A "transition" (as I call it) between two independent clauses. An independent clause is a part of a sentence that by itself could be a sentence. For example: Tina hadn’t practiced all week. She played beautifully. (Question 10)

Any list. "We did A, B, and C."

With a conjunction (and, but, for, nor, yet, or, so). "We can do A, but not B."

"Introductory elements". This is sometimes optional, but generally using a comma is correct regardless of if it is necessary. Question 11: Underneath the rug [comma] in the front room [etc]. The "underneath the rug" is introductory and dependent on the rest of the sentence.