Gloria: There is mall.
Correct: There is a mall.
Explanation: The indefinite article "a" refers to a particular or certain one of a class or group thing: a man; a chemical; a house.

Gloria: My brother is angry now.
Correct: My brother is angry right now.

Gloria: I play with my computer.
Correct: I play on my computer.
Explanation: The preposition "on" is used when referring to the surface of something, days and dates, a device or a machine, part of the body, and state of something.

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Hello, Gloria! Thank you for submitting your homework. Please take note of the corrections that I have made for you. Enjoy your weekend, Gloria!

-Teacher Isabel