1. Yo veo.
2. Yo tengo un hermano.
3. Yo hago mi tarea.
4. Yo soy inteligente y guapo.
5. (I’m not sure if this is correct but..) Yo conozco a Maria.
Correct me if I’m wrong at #5. Just trying my best, hope this helps.
Easy: the first one the answer is fui and the second one is the first one, estabas
Amanda y Cristina trabajan en el examen.
The answer for that question is “correct”