l feel good. (This sentence is correct.)
l jump.        (This sentence is correct.)
she is  girl.  ---> (She is a girl.)
l like cake.   (This sentence is correct.)

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*Please study the usage of Articles (a, an and the) in a sentence.

Hi Gideon!

        Thank you so much for sending me your homework. I am very happy that you are becoming more interactive and you can easily learn some words.  Keep it up! Study your book and practice speaking English even at home.

~Teacher Cassie ^^