A.Childrenwhocannotspeak.
A.Sizeofthechildrenattending.
B.Sizeofthebooksondisplay.
C.Havetheirvisitsarrangedingoodtime.
D.Helpthemselvesforbooks.
A.Itcanbecookedinmanyways.
B.Itisdeliciousbutinexpensive.
C.Itgiveshigheryieldsthanothergraincrops.
D.Itgrowseasilyinvariousconditions.
A.TheyledtothediscoveryofAmerica.
B.TheymadenativeAmericanfoodspopular.
C.TheybroughtgreatwealthtoSpain.
D.TheymadenativeAmericanlifestyleswell-known.
A.Earlymandidn’tknowhowtomakeuseoftrees.
B.Treesarenotasusefulastheywereinthepast.
C.Treesweremoreusefulinthepastthantheyarenow.
D.Treesarealwaysusefulandimportanttohumanbeings.
A.Thelandwouldbecomefertile.
B.Heavyrainswouldcleanthetropics.
C.Therich,fertilesoilcouldn’tberetained.
D.Therewouldbenoagriculture.
10.
A.Mancanchangethebalanceofnaturejustastheyplease.
B.Ifthebalanceofnatureislost,itwillbeattainedagain.
C.Manmustplantasmanytreesaspossible.
D.Somedesertareasarethenature’spunishmentofthehumanbeingsfortheirignorance.