Complete the sentences using the words or phrases given in their correctforms. You can add some more necessary words. 

Just imagine / human life / be like / 20 years. 

The photovoltaic effect is _____________ 

According to the text, _____________________

Which can not help us to solve the problem of energy crisis?

A solar car is supplied power from _____________ 

According to the text, ___________

(35) _____ addition, it is likely that in the near future we will see robots-taking on some of the care functions elderly, or long-term ill people.

Demographic changes, such as a rapidly aging population and a shrinkingworkforce, will drive forward the application of new (34) ___.

…that not only does the household cleaning and prepare and serve hismeals, (33) _____ also can carry him to the bathtub if he cannot walk.

Within the next 10 years one will be able to (32) _____, to lease orpurchase a domestic robot

"We have only one child but I could easily (31) _____ five or six robotsin the home as well."

"The advances in robotics make it clear that many household chores willbe easily handled by a robot in the near future," says Bob Christopher, who worksfor a robotic technology company that is marketing a toy robot (30) _____ Pleo.

"The advances in robotics make it clear that many household (29) ____will be easily handled by a robot in the near future," says Bob Christopher, whoworks for a robotic technology company that is marketing a toy robot (30) _____Pleo.

"I think in (28) _____ next thirty years, we are going to see atransformation between the industrial sorts of robots to personal robots," saysBrooks from Brooks' company, IRobot, markets floor cleaning robots for homes.

Robots can (27) _____ be found from vacuuming the floors in your hometo exploring the surface of Mars.

Military and police organizations use robots to (26) _____ in dangeroussituations.

Choose the best answer to complete each sentence 

I think we maybe run _______ natural resources some day.

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Washing machines, vacuum cleaners, and dish washers are labor _______ devices which help us do housework easily and quickly.

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The idea of building a _______ with human intelligence is not only ambitious butalso highly unconventional.

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We sometimes go away from the city to the countryside for a ______ of fresh air.

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_______ Europe and Asia are coming to rely more and more on ______ nucleargeneration.

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There is one _______ thing we can be sure: _______ energy will be morechallenging and more important in the future.

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On _______ Internet and with cable television we can select information from_______ wide variety of sources.

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Doctors and pharmacists have to assume _______ for human life.

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The ______ of the future will no longer be remedial. It will be preventive.

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Strict ________ measures are in force in the capital to protect it from terrorism.

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Due to industrialization, we have to cope _______ the fact that many species are_______ danger _______ extinction.

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I was brought _______ in the countryside by my aunt after my parents had pass _______.

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She is looking _______ a new place to live because she does not want to depend_______ her parents any more.

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The medical community continues to make progress in the fight against cancer.

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A _______ is a spacecraft that is designed to travel into space and back to earth several times.