A.lift heavy weights up to ten tons
B.test the steel for strength
C.heat the molten steel
D.boil a jug of water

A.It is cheap and easy to use.
B.It is used to drive motor engines.
C.It can be adapted to various uses.
D.It can be made with ease.

A.Voltages
B.Electric magnets
C.Generators or turbines
D.Pipes and radiators

A.atomic power and water
B.water and coal
C.sunlight and wind power
D.wind and gas

A.harmful effects
B.the tides
C.scientists
D.new ways

A.Our new
B.have been living
C.before moving
D.to

A.Our new
B.have been living
C.before moving
D.to

A.one example
B.Red Bull
C.the company
D.thirst quencher

A.Colas have been on the market longer than other so-called "energy drinks".
B.The makers of Red Bull say that it can revitalize a person.
C.Bauer does not seem to believe the claims of energy drink makers.
D.It has been scientifically proved that energy drinks work.

A.Teenagers should not choose energy drinks.
B.Caffeine is bad for people to drink.
C.Red Bull is the best energy drink.
D.It is uncertain whether energy drinks are healthy.