Final answer:
To write 'I must do my homework' in the negative form, use 'I mustn't do my homework' or 'I must not do my homework'. Incorrect options include 'I must do not do my homework' and 'I do not do homework' because they are grammatically incorrect or change the original sentence's meaning.
Step-by-step explanation:
To make the sentence 'I must do my homework' negative, you would write 'I must not do my homework' or 'I mustn't do my homework'. The correct form uses the contraction 'mustn't' or the full form 'must not'. Your other suggestions, 'I must do not do my homework' and 'I do not do homework', are incorrect. The first one incorrectly places 'do not' in the sentence, and the second changes the meaning of the original sentence—it states a general fact rather than an obligation not to do something.
For the comma insertion questions, the correct answers would be:
I finally found my keys, and I got to work just in time.
Mrs. Contreras threw out her old coffee table and cleaned the carpet.
Taking the elevator to the roof, we hoped we could see the skyline and the bay.
Though Susan wasn't feeling well, she went to the store anyway and bought ice cream, pizza, and candy.
I let my neighbor borrow my phone because she said hers was tapped by the police.
For the apostrophe usage questions, here are the corrected sentences:
Jack's and Jill's hill is nothing more than a mound of dirt on the southwest corner of Farmer John's land.
One's labor is proportional to one's wealth.
George shouldn't say that he'll be in the library when he obviously won't.
I'll be back.
Who'll referee those kids' soccer game if not for your brother?
For the word choice practice, the correct sentences are:
Can you hear the phone ring from here?
Are you going too the movie theater at two p.m., or is that too early for you?
This show always has a depressing effect on me.
It's hard to find small apartments for rent in this neighborhood.
Let's meet at the pizza place so that I can eat something without meat.
Although it will need work, its basic structure is sound.
Check about insuring personal items in your apartment.
You can set the groceries on the table over there.
I'm going to watch the game at their house.
How do you think the elections will affect the neighborhood?
They're listening to music on their headphones.
Your going to trip if you don't tie your shoelaces.
Bring your phone to the store to exchange it for a new one.
Whether we travel depends on the weather.