求个完形填空The great plains of the middle west where wheat is gro

求个完形填空
The great plains of the middle west where wheat is grown in vast quantities 71 more closely with conditions found in southern Russia 72 with anything in western Europe.In winter cold and wind are particularly 73 ,and the pioneers had to suffer terrible hardships 74 they had established enough comfort to give them reasonable 75 .But the modern mechanized farmer has little to fear 76 that his equipment functions as it 77 .
In the Rocky Mountains the climate is 78 would be expected in a mountain area,with heavy snow in winter 79 mixed] by brilliant sunshine and warm day in the summer even up to quite considerable 80 .The mountains seem to have an enormous prospect 81 a holiday area,and vast sections of them have not 82 been opened up.Here too the problem of what to do 83 the water has been acute,and enormous 84 already exist for controlling it and for getting 85 power from the great 86 of waters in the Colorado and other great rivers.
The climate of the United States,with all its 87 and violence,its frost and snow 88 far into the south,and the great heat of summer,89 life difficult for the ill-equipped pioneers and for the Indians before 90 .
71.[A] correspond[B] collapse[C] combine[D] command
72.[A] and[B] but[C] also[D] than
73.[A] interior[B] intense[C] interfering[D] intermediate
74.[A] when[B] but[C] before[D] after
75.[A] cover[B] covering[C] hiding[D] shelter
76.[A] provided[B] suppose[C] supposing[D] assumed
77.[A] would[B] should[C] might[D] is
78.[A] that[B] it[C] how[D] what
79.[A] marched[B] matched[C] mastered[D] mixed
80.[A] heightens[B] attitude[C] highs[D] heights
81.[A] with[B] about[C] as[D] in
82.[A] yet[B] only[C] still[D] had
83.[A] with[B] for[C] in[D] on
84.[A] stones[B] schemes[C] specimens[D] spheres
85.[A] station[B] electricity[C] electrical[D] electric
86.[A] race[B] fly[C] flow[D] run
87.[A] variables[B] variation[C] velocity[D] vacuum
88.[A] fallen[B] falling[C] reached[D] reaching
89.[A] made[B] caused[C] put[D] got
90.[A] ever[B] it[C] them[D] then

71.[A] correspond[
72.[D] than
73.[B] intense
74.[C] before
75.[D] shelter
76.[A] provided
77.[B] should
78.[C] how
79.[B] matched
80.[D] heights
81.[C] as
82.[A] yet
83.[A] with
84.[B] schemes
85.[D] electric
86.[C] flow
87.[A] variables
88.[D] reaching
89.[A] made
90.[C] them
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