Correct the mistakes 1When was invented the radio. 2The book was wrote Pushkin. 3A lot of people will invited to the

1. When was the radio invented? 2. The book was written by Pushkin. 3. A lot of people will be invited to the party. 4. Where was the key found? 5. Last year a very important letter was lost in the post office. 6. All his pens were borrowed. 7. This car will not be stolen. It is protected.