To make it parallel I would say to put it in this format: We can’t go back; to go forward is our only option. This makes the verbs the same.
Answer: Old master provide evidence that the author was enslaved.
Explanation: My explanation is that he also said he had to run errands and only had little time to enjoy thr life they had.
We could have gone to the store before we got home.
Answer: Since I'm of young age people normally doubt me and the knowledge I hold because I am young people doubt I know what I like for example I'm a Lesbian so my parents and other adults always tell me I don't know so something I've noticed is adults are skeptical of children knowing what they want even if the child may be very mature. As you age people take you more seriously since you have more experience and have grown out of puberty which means you're usually a mess. So that's what I noticed.
Explanation: