Это Present Perfect Passive

1 - A lot of things have been improved

2 - the townhall has been ewnovate

3 - some benches have been added in pedestrian areas

4 - a new pond has been created in the park

5 - old trees have been cut down

6 - new trees have been planted instead

7 - a new zoo has been opened near the town

8 - a football stadium has been built on the outskirts

9 - computers have been installed in the library

10 - a wifi network has been established in some public  areas