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Tidal energy is renewable plentiful and clean -Wind will be used as an environmental friendly sources of energy . -There are many ways will be used to solve the problem of pollution
Chỉ biết từng đó hoi à! Thông cảm nha!
-Tidal energy is renewable ...plentiful......... and clean (plenty)
-Wind will be used as an ......enviromentally......... friendly sources of energy . (environment)
-There are many ways will be used to solve the problem of ....pollution...... (pollute)
-.......unfortunately....... , fossil fuels are harmful to the environment (fortunate)
-We should use them ....economic.......... and try to find out alternative sources of power . (economy)
-I think that solar energy can be an ...alternative.......... source of energy in the near future (alter)
-It's a clean source of energy . Sailboats couldn't move without this ......power....... (powerful)
-Limit car trips by relying on biking , walking public ..transportation........... (transport)
-Energy is used to ....produce........ a lot electrical thing (product )
-I don't think so . The solar penels are becoming .....uncheap....... and easy to install (cheap)
The search (26) for alternative sources of energy has led in various directions. Many communi- ties are burning garbage (27) and other biological waste products to produce electricity. Converting waste products to gases or oil (28) is also an efficient way to dispose of waste.
Experimental work is being done to derive synthetic fuels (29) from coal, oil, shale and coal tars. However that process (30) has proved to be expensive. Other experiments that are underway to harness power with giant windmills are also (31) being tested.
Some experts expect utility companies to receive hydroelectric power (32) derived from streams and rivers. Fifty years (33) ago hydroelectric power provided one third of the electricity used in the United States, but today it supplies only four percent. The oceans are another potential sources of energy. Scientists are studying ways to convert the energy of ocean currents, tides and waves (34) to electricity. Experiments are also underway to make use (35) of temperature differences in ocean water to produce energy.
1. Natural gas is cheaper and less polluting than coal.
Coal is more expensive and more polluting than natural gas
2. We are trying to find cheap and clean and effective sourced of energy.
We are looking for cheap and clean and...
3. Will solar and wind replace fossil fuels within 20 years?
Will fossil fuels be replaced by solar and wind within 20 years?
4. This is the second time I have visited Yaly hydroelectric power plant.
I have visited Yaly hydroelectric power plant twice
5. They built the first hydroelectric power plant in Niagara Falls in 1879.
The first hydroelectric power plant was built in Niagara Falls in 1879
6. It’s a good idea to switch off electrical appliances when they aren’t in use.
You should switch of electrical appliances when...
7. Although coal is the most polluting of fossil fuels, it is still the largest sources of energy worldwide.
Despite being the most polluting of fossil fuels, coal is still the largest...
8. Biogas will be used for fuel in homes and for transport.
People will use biogas for fuel in homes and for transport
Câu 3 là dạng bài chuyển từ câu chủ động sang câu bị động thì TLĐ:
CĐ: S + will (not) + V
-> BĐ: S + will (not) be + P2 + (by O)
Câu 8 là dạng ngược lại của câu 3