A) grow b) has grown c) grew

A) prevailed b) were prevailed c) had prevailed

Technologies that _____________ for centuries became obsolete in a matter of years, and the 20th century emerged as the age of fossil fuels.

A) changed b) were changed c) had changed

The world cities _______ greatly as horse-drawn carriages and gas lamps were replaced with automobiles and electric lights.

A) was created b) created c) create

Much of the used system now ________ in an explosion of invention that began around 1890, and was largely finished by 1910.

A) had b) has had c) will have

It has been about a century since the world _______ a comparable opportunity to change its energy system.

Choose the right form of the verb and translate the sentences

A) cultured b) culturing c) having cultured

A) increasing b) increased c) having increased

Poaching are causing polar bears to die out in the remote Siberian region of Chukotka, according to an expert with the International Fund for Animal Welfare (IWAF).

A) involving b) involved c) being involved

The damage of ozone has been caused by complex chemical reactions _______ chlorine and bromine.

A) using b) used d) being used

Aquaculture is a diverse sector _________ many strategies for fish production.

A) growing b) grown c) being grown

Wind and solar power are the fastest ________ energy sources in the world, experiencing rates of growth and technology advancement comparable to the electronics industry

Choose the right variant of Participle and translate the sentences

A) may b) must c) should

A) may b) must c) should

A) can b) could c) should

A single wind turbine ______ produce enough electricity to power 375 homes and these wind farms are already making a small but significant difference.

Choose the right modal verb and translate the sentences

Exercises

2. Extracts of seaweeds _____ be obtained directly by man that become components of a variety of substances each of us uses every day.a) may b) could c) must 3. Once the species for culture has been selected and the culture system has been constructed and stocked, aquaculturists _______ address various management concerns.4. In order to control reproduction in the hatchery environment, the aquaculturist ______ understand how the species of interest behaves under natural conditions.5. The consumption of uncooked fishes raises the issue of parasites that _______ infect humans and lead to health problems.a) might b) may d) can5. The second most widely ________ group of fishes in the world today are the tilapias.

5. Global production from aquaculture _______ substantially, contributing increasingly to the world’s supply of fish for human consumption.

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