Jawaban:

1. Rendy was fallingoff the ledder while hewas painting the wall

2. Tiffany was studyingwhen iwas calling her by phone last night

3. The driver was drivingvery fast when the policemanwas stoping them

4. While I was riding to school yesterday, i was seeing an accident

5. I was reading a great book in the public library last week

6. Namira was fallingasleep while shewas watching the movie

7. My friends were droping infor a visit while Iwas watching TV last night

8. I was seeing Ananda at the restaurant last night. She was wearing a beautiful dress

9. The kids were going to bed at 9:00 kast night/At 10:00, they were sleeping

10. My father was workingin his garage when hewas hearing a loud

11. When i was arriving at the movie theater, my friends were waiting for inside

12. Galuh was breakinghis leg while hewas playing football

13. Martin was workingin the garden when itwas starting to rain

14. Mr. Prakoso was gettinghome last night while his wifewas cookingdinner and his daughterwas playing  a doll

15. My family and I was having dinner at a new restaurant last night. While we were eating, one of the waitress was droping the tray on the floor.

Penjelasan:

Past continuous tense digunakan untuk menjelaskan peristiwa yang terjadi atau berlangsung secara bersamaan di masa lampau. Maka dari itu, di sini diperlukan keterangan waktu while atau when.

Rumus: Sb + Was/Were + Verb(ING) + Ket

I hope you'll get hit the mark

Have a good study :)