Word Pairs


  • Type the correct word in the boxes from the pairs of words [in brackets].
  • Click the button at the bottom to check your answers.
  • Press the "refresh" button on your browser to play again.

Scientists have come [down / up] with a revolutionary new idea to save planet Earth from global warming. Geo-engineers from Harvard University [belief / believe] that spraying "sun-dimming" chemicals [unto / into] the stratosphere high above the Earth could slow [down / downed] global warming. They also say their technique would be "[remarkable / remarkably] inexpensive," costing in the region of $2.25 billion a year [over / under] a 15-year period. The technique is known [was / as] stratospheric aerosol injection (SAI). It is still in its [infancy / infants] and is yet to be proven. It would involve the use of gigantic [hose / hoses] or high-powered chemical cannons to spray chemicals into the stratosphere to act as a reflective barrier against [sunlit / sunlight] and harmful UV rays.

The scientists have [admitted / admission] that their idea is currently still in the planning [stages / staggers] . They said: "We make no [judgment / judge] about the desirability of SAI. We simply [show / shown] that a hypothetical deployment program commencing 15 years [once / hence] , while both highly uncertain and ambitious, would indeed be technically possible from an engineering perspective." Not all scientists think the [idea / idealism] is a good one. Some think it is somewhat [spy / pie] in the sky. They say it would require a [fleet / fleece] of 100 specially-designed planes to make 4,000 missions a year, crossing most of the globe's airspace. This would [requirement / require] permission from over 100 governments. There are also concerns it could increase [draughts / droughts] and extreme weather.

Back to the sun dimming lesson.

Share this lesson

More Free Sites by Sean Banville

Online Activities