Question 1: Identify and correct the error in the sentence: 'The teacher asked whom should I speak to about the project.'

Answer: The correct sentence is: 'The teacher asked whom I should speak to about the project.'

Question 2: In the sentence: 'The boy whom broke the window was very upset,' what is the grammatical mistake, and how can it be corrected?

Answer: The mistake is 'whom' used incorrectly; it should be 'who.' The corrected sentence: 'The boy who broke the window was very upset.'

Question 3: Select the correct option: 'To ____ should I send this package?'

Answer: a) whom

Question 4: Correct the error in this sentence: 'The person who I saw at the store was my neighbor.'

Answer: The sentence should be: 'The person whom I saw at the store was my neighbor.'

Question 5: Find and correct the mistake: 'The coach, whom is very strict, expects us to practice daily.'

Answer: The correct form is: 'The coach, who is very strict, expects us to practice daily.'

Question 6: Rewrite the sentence correctly: 'I wonder who will win the race tomorrow.'

Answer: The sentence is already correct.

Question 7: Correct the sentence: 'The girl whom I met yesterday gave me a gift.'

Answer: The correct sentence is: 'The girl who I met yesterday gave me a gift.'

Question 8: Explain why 'who' is used in 'The person who I saw at the store' and 'whom' in 'To whom should I send this letter.'

Answer: 'Who' is used as the subject of a clause, while 'whom' is used as the object of a preposition or verb.

Question 9: Write a correct sentence using 'who' or 'whom' based on the prompt: 'Ask the person ___ helped you yesterday.'

Answer: Ask the person who helped you yesterday.

Question 10: Identify and correct the error: 'The person who I saw at the store was my neighbor.'

Answer: The correct sentence is: 'The person whom I saw at the store was my neighbor.'