Answer:
-Haz.
Explanation:
The correct way to say it (in this case) would be:
-Haz lo justo. (tu)
You can also say:
-Vinimos para hacer lo justo.
Then, depending on the person (and also the context) you are talking to you could say:
-Usted haga lo justo.
-De manera tal que tu hagas lo justo.
I have no idea. Where is the rest of the problem?
Habla. Which is feminine and single.
<span>2. last year not so difficult
</span><span>1. present hopes will be easy, but doubts it
</span><span>3. future a lot to do</span>