Earth Hour started in 2007 when 2.2 million people and more than 2,000 businesses turned their lights off for one hour to ___________.
举一反三
- A typical instant-messaging conversation lasts ________.( ) A: more than one hour B: at least half an hour C: at least one hour D: more than one place
- “Lights Out London” was organized in 2007, but for only one hour on one day. ( )
- I waited for him half an hour, but he never _______. A: turned in B: turned down C: turned off D: turned up
- The flight was _____ about a quarter of hour because of the fog. A: given off B: kept off C: put off D: turned off
- I waited for him half an hour，but he never __________． A: tumed in B: turned down C: turned off D: turned up