Succeed in IELTS T 4

Fossil fuels

• coal

• crude oil

• water

• natural gas

• the wind

Alternative energy sources

• the sun

• crude oil

• water

• natural gas

• the wind

If something is gaining popularity, it will

• have an impact in the years to come

• have side effects

• be an obstacle to the development of something

• have low production costs

If something has prevented the mass use of an energy source, it

• has an impact in the years to come

• has side effects

• is an obstacle to the development of that source

• has low production costs

The movements of the ocean are called ​

• turbines

• extractions

• tides

• harnesses

• fluctuations

a situation in which prices, levels or interest rates go up and down

• turbine

• extraction

• tide

• harness

• fluctuation

to control something, usually in order to use its power

• turbine

• extraction

• tide

• harness

• fluctuation

the process of removing a substance from the ground or from another substance

• turbine

• extraction

• tide

• harness

• fluctuation

• turbine

• well

• tide

• harness

• fluctuation

• turbine

• well

• tide

• harness

• fluctuation