_________(57)A.things B.chemicals C.water D.air

57._________A. recipesB. projectsC. receiptsD. in

57._________A.smallB.hugeC.simpleD.colorful

57._________A. chooseB. watchC. drawD. recognize

57._________A. whereB. whatC. thatD. how

57._________A. birthplacesB. playgroundC. reserve

_________(56)A.gas B.liquidC.solid D.air