Ответ:

1. Were talking

2. Was talking

3. Was looking

4. Were glittering

5. Was eating

6. Was waiting

7. Was preparing

8. Was arguing

9. Was hurrying

10. Was starting

1. Were writing

2. Was working

3. We were watching

4. Was/were you playing

5. Was you drinking

6. Was he drawing

7. Who was listening

8. Was it raining

9. Were they skating

10. She wasn't helping

Объяснение:

В past continuous к смысловому глаголу ВСЕГДА добавляется окончание ing (do - doing)

Если в утвердительном предложении лицо, совершающее действие, в единственном числе, то используется was (wasn't/ was not в отрицательных предложениях)

Если в утвердительном предложении лицо во множественном числе, то используется were (weren't/ were not в отрицании)

В вопросительных предложениях порядок слов меняется (на первое место становится вспомонательный глагол was/were, потом идёт лицо, совершающее действие и смысловой глагол.

He was doing homework. (+)

Was he doing homework? (?)

He wasn't doing homework. (-)