1.
| Children are usually full of energy.
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2.
| What types of energy do you know?
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3.
| What type of energy heats our houses?
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4.
| Generator produces energy.
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5.
| What powers the motor in this machine?
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6.
| This is a high-powered engine.
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7.
| How much is central heating nowadays?
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8.
| What type of energy was used to heat buildings a century ago?
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9.
| When was camera invented?
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10.
| Is it your invention?
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11.
| Who is the inventor of the wind-up technology?
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12.
| Implant – is a very useful invention.
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13.
| Before the invention of printing people had written books by hand.
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14.
| People usually store information on their computers.
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15.
| Energy can be stored and then used.
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16.
| Storing energy was a very clever invention.
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17.
| Solar energy is converted into electricity.
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18.
| It’s cheaper to convert solar energy into electricity to heat buildings.
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19.
| Japanese cars are usually very reliable.
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20.
| Electrical power is unreliable in some countries.
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21.
| People should care about the planet for future generations.
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22.
| A new generation of implants has just been invented.
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