No, the correct punctuation would be: Your nephew, David, is a lawyer.
Yes, the sentence is punctuated properly. The possessive form for both "mother" and "father" is indicated by the placement of the apostrophe before the s, making it clear that it refers to the marriage belonging to both parents.
It should be ---- Cars are expensive; motorcycles are dangerous.
The sentence should be punctuated as: "What a beauty!" exclaimed Susie.
no. that sentence is punctuated correctly.
Joe said, "The garden is watered!"
No, not everything is capitalized and punctuated correctly in the sentence. It should be: "Her short story entitled 'The Shower' won the first prize in the writing contest."
PTA should be punctuated with periods as an abbreviation for Parent-Teacher Association.
The sentence should be punctuated as: "The district attorney you're serious about has been arrested."
You can not punctuate a sentence with a semicolon.
" When a car is driven the gasoline it burns as fuel release carbon dioxide into atmosphere" as stated in your question is properly capitalized. If the same sentence were properly punctuated, and used all the correct wording, it would read like this: "When a car is driven, the gasoline it burns as fuel releases carbon dioxide into the atmosphere."
No, the sentence is missing proper punctuation. It should be: "The three Reno brothers' dog always finds a way to escape and run around in both neighbors' gardens."