TheaveragelifeexpectancyoftheRedIndiansis________.
A、higherthanthenationalaverage
B、lowerthanthenationalaverage
C、aboutthesamewiththenationalaverage
D、noneoftheabove
重写句子：Theteacherreturnedthehomework.Theteachernoticedtheerror.(complexsentence)
TheMississippi,whichissometimescalled________,hasplayedavitalroleinthehistoryoftheUnitedStates.
A、“OldManRiver”
B、“MoonRiver”
C、“OldFatherRiver”
D、“MotheroftheUnitedStates”
Basically，theseattitudesamounttoabelief________leisurecanandshouldbeputtogooduse
A、which
B、that
C、what
D、how
Agriclturalchangesinthelate18thandearly19thcenturiesinEnglandweresogreatthattheywereworthyoftheterm“________”.
A、reform
B、evolution
C、revolution
D、reformation