I some stuff A)'ve done B)'s do C)'s doing D)'s did E) 've

A and E

Step-by-step explanation:

If the answer was A, it would translate to:

I have done some stuff.

If the answer was D, it would translate to:

I have some stuff.

Both of the sentences are grammatically correct, so A and E are the answers.

Incorrect:

B. - I's do some stuff - doesn't make sense

C. - I's doing some stuff - doesn't make sense

D. - I's did some stuff - doesn't make sense

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.