Gloria: English is language.
Correct: English is a language.
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: I don't lke Math.
Correct: I don't like Math.

Gloria: I think science is hard.
Correct: I think Science is hard.

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Hello, Gloria! Thank you for submitting your homework! You did a great job! See you tomorrow!

-Teacher Isabel