Nicole:I was begging my mom to have a smartphone
Correct: I was begging my mom to buy me a smartphone.

Nicole:Teachers insist me to get a perfect score
Correct: No correction.

Nicole: My freind, Sarah's parrot stinks so I don't like Sarah's parrot.
Correct: My friend's Sarah's parrot stinks so I don't like her  parrot.
Explanation: The pronoun "her" is used as the object of a verb or preposition to refer to a female person or animal previously mentioned or easily identified.

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Hello, Nicole! Thank you so much for submitting your homework. A job well done! See you tomorrow!

-Teacher Isabel