Sure! Here’s a rewritten version of the sentences:

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11. The hotel cleans the rooms on a daily basis.

12. The post office organizes the letters by postal code prior to delivery.

13. The system automatically backs up data every evening.

14. The office conducts meetings every Friday.

15. Our school offers multiple new courses each semester.

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**Fill in the correct form of the verb in the past simple:**

My girlfriend **invited** me to the party.

Key **was not found**.

The red car **was stolen** by a woman last night.

The thieves **were arrested** by the police.

My mother **was bitten** by an aggressive dog.

Hot dogs **were eaten** by Tom and David.

Livestream **was watched** by millions of people around the world.

The film Harry Potter **was directed** by Steven Spielberg.

How many bottles of beer **were drunk** last week?

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**Using past simple, change the following sentences into passive form:**

1. A Japanese song was sung by my mother.

2. The flowers in the garden were watered by my father.

3. My mother’s money was stolen by a thief.

4. Her homework was not done by Linh.

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Let me know if you need anything else!