2: Mi amigo esta en la escuela.
3: Buenas trades Señora Wilson.
4:Buenos dias Señora García.
5:Buenos dias Señor Acero.
Well, it does seem correct - the tenses are used correctly, the articles agree with the pronouns/nouns in the sentence, so I think it is good.
There is only one thing, but I don't know if that is a typo or what - there should be a period between limpio and <span>él because those are two separate sentences. </span>
Answer:
21 is le
22 is me
23 is le
24 is le
I do not know the anwer to 25
Answer:
they are asking you to write the subject of the sentence in the blank space
Explanation: