Помогите!!!!!!!
Choose the appropriate form of personal pronouns.
1)(They, them) help (we, us) in our work.
2)(we, us) will send (she, her) some new books.
3)(i, me) told you about my friends but (I, me) am not sure if you have seen (he, him).
4)Everybody likes John because (he, him) is helpful
to all of (us, we)