Ma
da
a
dotherI
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tribeshousi
gadoze
families”可知，应选B项。74答案B。【解析】细节理解题。文章中出现的grass是I
dia
tribes建造房屋所必不可少的东西。由此可知，印第安人的屋子都用草盖着。由此可知B项正确75答案C【解析】推理判断题。根据第二段最后一句“Theycouldquicklyclosethisope
i
giftheire
emiescame
ear”可以推断出theIroquoisI
dia
s建造房屋的时候把自身的安全考虑在内了。因此可推断出C项
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