词汇运用用括号内所给词的适当形式填空

81.Manypolarbearsdiebecauseof_________(lose)theirlivingareas.

82.Male________(wolf)willprotecttheirfamiliesifthereisdanger.

83.I’msoweakthatit’sdifficultformetoclimbtothe_________(12)floorwithoutalift.

84.Parentsshouldteachtheirchildrentolearntoprotect_________(they)whentheyareveryyoung.

85.Ourteacheroftentellsusthatit’s_______(correct)tohuntorfishinnaturereserves.

86.Badweathersometimescauses___________(nature)disasters.

87.Amyisananimalloversheoftentouchesthelovelycatas_______(gentle)asshecould.

88.Theradiosaysthatitwillbemuch_________(fog)tomorrow.

89.Thefarmers__________(destroy)theforeststobuildroadslastyearsothewolvesdidn’thavesuitablehomestolivein.

90.Childrenareusually________(happy)thantheirparentsduringtheSpringFestival.

91.Alargenumberoffarmersmovedtothe__________(south)citiestofindjobsinthe1980sandnowmostofthemarelivingabetterlife.

92.Thegovernmentencouragestheworkers__________(start)businessesontheirown.

93.Theheavyrainpreventedtheoldman____________(send)hisgrandsontohospital.

94.Giantpandas (notsurvive)ifwedon’tprotectthem.

95.Ifyou (notbe)carefulenoughintheexamyouwillnotgetagoodgrade.