Jini:  Make sentance
Correct: Make sentences.

Jini: We must obey rules on the internet.
Correct: We must obey the rules on how to use the internet.
Explanation: The definite article "the" is used especially before a noun or nouns like people or things.

Jini: I uesd to block the spam messages.
Correct: I  used to block spam messages.

Jini: You can buy some snacks and recharge a transportation card at the convenience store.
Correct: No correction.

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Hello, Jini! Thank you for submitting your homework. You're doing great. Keep it up!^^

-Teacher Isabel