3. определите время и залог сказуемого в предложении practically all oceans and seas are used for dumping industrial and nuclear wastes. поставьте предложение во все времена группы perfect passive voice, внеся необходимые изменения (обстоятельства времени). 4. употребите следующую структуру в
i,ii,iii типах предложения условия. if the world population (to continue) to grow there (to be) a disaster.

The cuisine of the United States reflects its history. The European colonization of the Americas yielded the introduction of a number of ingredients and cooking styles to the latter. The various styles continued expanding well into the 19th and 20th centuries, proportional to the influx of immigrants from many foreign nations; such influx developed a rich diversity in food preparation throughout the country.

Early Native Americans utilized a number of cooking methods in early American Cuisine that have been blended with early European cooking methods to form the basis of American Cuisine. When the colonists came to the colonies, they farmed animals for clothing and meat in a similar fashion to what they had done in Europe.

I believe that volunteers and their help are very much in need nowadays. These people are willing to selflessly help other people. At any time of the day, they are ready to come to the rescue. Volunteers take care not only about people but they are also concerned about animals and about nature. Volunteers help to clean rivers, forests, they plant new trees and shrubs in cities, thus making them more livable. Volunteers save animals from poachers, they provide assistance to animals if they are injured.   That is fine if you become a volunteer. The main thing is to be kind and friendly and to do the best to others.  Then the world will definitely be better.

Я считаю, что волонтеры и их очень сейчас нужна. Эти люди готовы бескорыстно другим людям. В любое время суток они готовы прийти на Волонтеры заботятся не только о людях, но и о животных, о природе. Волонтеры очищать реки, леса, высаживают в городах новые деревья и кустарники, тем самым делая их более пригодными для жизни. Волонтеры животных от браконьеров, оказывают животным, если они травмированы.    Это нормально, если ты становишься волонтером. Главное быть добрым и дружелюбным, и делать все возможное для других. И тогда мир, безусловно, будет лучше.