He helped do it.

A. me

(Correct: "He helped me do it.")

It's ........ party.

B. mine

(Correct: "It's my party" or "It's mine.")

He hurt

A. his

(Correct: "He hurt his arm" or another body part.)

She did it

B. herself

(Correct: "She did it herself.")

He took it from

The sentence seems incomplete. If you're asking about a possessive form or reflexive pronoun, the sentence might be completed as:

"He took it from me" or "He took it from himself" depending on the context. Could you clarify or provide more context for this sentence?