miscommunications at work

Last week a girl that I work with needed to take a test during her shift. I work the same shift, but as a rush server, so i am only there for 2 hours instead of 5-6, but it is usually slow and we don't need everyone to be there. I told her that it would be fine if she went and took the test because we didn't need her. I meant that she could come to work her shift and could leave for her test and then come back. She thought I meant that I would work for her and we just wouldn't have a rush server.
It ended up fine because I sensed that she thought that and I went in early and made sure that she was going to come in after her test so that I could leave when I normally would to study for the test I had the next day.
Next time I will make sure that I say exactly what I mean and not leave room for confusion.

Mock Interview

I expected to be really nervous about the interview, but I was only a little nervous. I think that I was less nervous because I reminded myself that I was just talking to another person who has been in my seat before and understands. I also remembered that I have had interviews before and have done fine.
One question that threw me was "what have you accomplished that you are most proud of?" I answered that I was proud to have moved from New York to South Carolina all by myself with only my aunt and uncle here. I'm still not sure what I am most proud of though.
If I could do the interview again I would have questions prepared for the interviewer so I could get a better feel for the job and the type of company I would be working for.
I learned that you need to be able to think on your feet in an interview because you never know what type of question they are going to ask you. I also learned that I just need to remind myself that I am just talking to another person.