1. did you sleep well last night?
yes, I did. I slept very well.
2. Did Tom's plane arrive on time yesterday?
yes, it did. it got in at 6:05 on the dot.
3. Did you go to class yesterday?
No, I didn't. I stayed home because I didn't feel good.
4. Did Marck Twain write Tom Sawyer?
yes, he did. he also wrote Huckleberry Finn.
5. Did you eat breakfast this morning?
No, I didn't. I haven't enough time. I was late for class because my alarm clock didn't ring.