Răspuns:
A. 1.My sister tidied her room yesterday.
2.My sister didn't tidy her room yesterday.
3. Did your sister tidy her room yesterday?
B. 1. We lived in London last summer.
2. We didn't live in London last summer.
3. Did you live in London last summer?
C. 1. Sandra and Elsa were talking on the phone last night.
2. Sandra and Elsa weren't taking on the phone last night.
3.Did Sandra and Elsa talk on the phone last night?