Find the mistake in each sentence and write the word or phrase correctly.
0. Example: That activity holiday has being recommended. ответ: been
6. The first tunnel of The London Underground has completed in 1843. ______________
7. Public transport is supported from the government. ______________
8. The trains is often packed, especially at rush hour. ______________
9. A new airport will being built here next year. ______________
10. The last seat on the plane have just been booked.________​