AfteranextradayinspacethecrewofDiscoveryreturnedtoEarthlandingatEdwardsAirForceBaseinCaliforniaearlyonTuesdaymorning.TheshuttleanditscrewspenttwoweeksinspacemostofitaboardtheInternationalSpaceStation.ItwasthefirstflightofNASA'sspace?shuttlefleetsinceFebruary2003whentheshuttleColumbiacameapartwhilere?enteringEarth'satmosphere.?

NASAofficialsdelayedDiscovery'sreturnforonedaybecauseofcloudyweatherinFloridawheretheshuttlewassupposedtolanD.OnTuesdaymorningmissioncontrollers?directed?DiscoverytoalandingsiteinCaliforniawheretheskieswereclear.ThecrewmemberswillhavetowaituntilWednesdaytoseetheirfamilieswhentheyallmeettogetherinHoustonattheJohnsonSpaceCenter.?

Discoveryhadaverybusymissioninspacecomparedtopastmissions.ThespaceshuttledockedwiththeInternationalSpaceStationmostofthejourneydeliveringbadlyneeded?supplies?andrepairingdamagedparts.Thecrewspentalotoftimetestingnewrepairtechniquesontheirownshuttleconductingthreedifferentspacewalks(whereastronautsexitthespaceshuttletodoworkoutside).OnthethirdspacewalkastronautSteveRobinsonwentunderneaththeshuttletoremovematerialstickingoutfrombetweenthespacecraft's?protective?tiles.?

TherewereconcernsinthelastremainingdaysofDiscovery'smissionthatatornheatblanket—anothershieldagainstoverheatinginthespaceshuttle—mayposeaproblemtocrewmembers.NASAofficialsandtechniciansworkedonwaysthatthecrewcouldfixtheproblembutlaterdecideditwasnotarisk.?

WiththeshuttleanditscrewsafelybackonfirmgroundNASAishailingthismissionlabeledSTS?114asahugesuccess.“Ihopethisshowspeoplethatwe'recomingback”NASAspaceflightchiefBillReaddysaidafterDiscovery'ssuccessfullanding.“We'vegotsomemoreworktodo.Weknowwhatweneedtodoandwe'lldoit.?

1.Whichofthefollowingisn'tincludedinthejobsoftheshuttleDiscovery?

A.DeliveringsuppliestotheInternationalSpaceStation.?

B.Conductingdifferentspacewalks.?

C.Testingnewrepairtechniques.?

D.FindingthecausewhytheshuttleColumbiacameapart.?

2.Butfortheclo