Can you say what was the email about?
To (C. estas) en la clase de ingles con Juan<span> ¿no?</span>
If you want to say "some of my friends are girls" then: Algunos de mis amigos son chicas.
We always use feminine pronouns (pronombres femeninos) for feminine nouns (sustanitvos femeninos).
You have to say "algunas de mis amigas"
It depends on what you want to say...
If its to indicate something they do then say: "de todos mis amigos, algunas de las chicas [add verb here]. Meaning: From all my friends, some of the girls [verb].
If you need more help, don't be afraid to ask me! ^^ Spanish is my native language
~Hope this helps~ ^-^
16) Correct
20) Yo
22) Ellas corren a la escuela
23) Soy
26) aprende
27) luz, papel, examen
31) Nosotros comemos en la mesa
40) Correct, although it needs a question mark but the words are correct
42) correct
45) Necesitas unos papeles?
I hoped this helped and if you need any more help in Spanish please feel free to ask me! - Maria S.