Sure! Here are the answers filled into the blanks based on the instructions provided:

**I. Change the sentences into the passive voice by filling in the missing words.**

1. My car **was stolen** while I was gardening.
2. A new restaurant **will be opened** next week.
3. Our street **is being closed** because of snow.
4. A new house **is going to be built** by my parents next month.

5. People eat 40 million hamburgers every day.
6. People speak English all over the world **every day**.
7. Where did they invent gun powder? **Gun powder** was invented where?
8. The police didn’t find the missing girl last weekend. **The missing girl** wasn’t found last weekend.
9. Tourists don’t visit this museum very often. **This museum** isn’t visited very often.
10. Workers are building a new fun park in town. **A new fun park** is being built in town.
11. When did they translate this book into English? **When was this book translated** into English?
12. Women send thousands of emails to the star every month. **Thousands of emails** are sent to the star every month.
13. Daisy brought me some fresh grapes. **Some fresh grapes** were brought to me by Daisy.
14. Some dangerous looking men were following me **the whole evening** by some dangerous looking men.

**IV. Change the sentences into the passive voice.**

1. Vietnamese is spoken by people in Vietnam.
2. A new road near my house is being planned by the government.
3. This house was built by my grandfather in 1990.
4. Guernica was being painted by Picasso at that time.
5. The office has been cleaned by the cleaner.
6. Three books had been written by him before 1867.
7. You will be told by John later.

**V. Change the sentences into the active voice.**

1. The policemen help the children.
2. The manager is typing a letter.
3. Sally’s little brother will look after her.
4. Someone broke our window.
5. We have cleaned the car.

Feel free to ask for any further help!