Change these active sentences into the passive so that they sound

1. Somebody opened the Channel Tunnel in 1994. - The Channel Tunnel was opened in 1994.
2. They have chosen the new design. - The new design has been chosen.
3. Thousands of people see this website every day. - This website is seen by thousands of people every day.
4. The employers asked the staff for their opinions. - The staff was asked for their opinions by the employers.
5. A mechanic is repairing my car at the moment. - My car is being repaired by a mechanic at the moment.
6. Somebody has found the missing file. - The missing file has been found.
7. Somebody made this watch in Switzerland. - This watch was made in Switzerland.