Ответ:

1.Did she go to the cinema on Saturday?

Yes, she did

2.Did he buy a new computer game last week?

No, he didn't

3.Did you do a lot of homework last night?

No, I didn't

4.Did they eat a lot of cake?

Yes, they did

5.Did we break a letter and say "thank you"?

Yes, we did

6.Did she write the world record yesterday?

No she didn't