Olimpiada task for 11th form

A) didn’t dump B) don’t dump C) dumped D) would dump

12. People will run out of drinking water one day if they (not use) it more rationally

A) don’t use B) didn’t use C) hadn’t use D) not to use

13.Find the continuation: Noise pollution is not the problem only for people, … .

A) it also helps them prevent nature B) it also harmful for the world’s whale population

C) for environment D) it is also harmful for the space

14. Complete the sentences: ___ ___ , which are formed from the skeletons of sea creatures, give shelter to a variety of plants and animals