4. Choose the correct tense

1. what DID YOU DO/WERE YOU DOING at 9 pm last night?
2. her parents BOUGHT/WERE BUYING her a boat last year.
3. I DIDN'T SEE/WASN'T SEEING her at school yesterday.
4. Tony DIDN'T RIDE/WASN'T RIDING his bike when I saw him outside the cinema - he was in his sister's car.
5. why DID YOU CALL/WERE YOU CALLING him last night