1 Complete the sentences with the correct passive form of the verbs given.

1. Most smartphones are made in China.

2. The first digital cameras were sold in Japan in 1989.

3. Cocoa beans are grown in West Africa.

4. The first email was sent in 1971.

5. Penguins are not found in the Arctic.

6. The first tweet was written in 2006.

7. A Fitbit is worn on your wrist to measure your heart rate.

8. 3-D printers were invented in 1983.