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Humans readily change tools to suit the circumstances: once a basic knowledge of tool-making has been acquired, it is a simple m
Humans readily change tools to suit the circumstances: once a basic knowledge of tool-making has been acquired, it is a simple m
admin
2014-09-24
86
问题
Humans readily change tools to suit the circumstances: once a basic knowledge of tool-making has been acquired, it is a simple matter to make something more suitable for the job【C1】______ . So early people made not only hand axes for chopping, but also smaller knives and scraping tools with which to cut meat and【C2】______ fat off the skins.
It is clear from archaeology that humans were【C3】______ from very early in history to exploit a much wider range of food resources than other【C4】______ . In particular they were frequently able to eat meat; the diet of apes is normally vegetarian(食草的), consisting of grass, leaves, and shoots,【C5】______ by insects and grubs. With tools such as spears and bows, early humans were able to【C6】______ larger animals. Spears and nooses(套索, 陷阱)could be used to catch birds and smaller animals,【C7】______ fish could be taken with nets and traps set on the river bottoms. Excavations(出土文物)made at the living sites of early people have revealed bones from the animals that they ate, while also providing【C8】______ of their ingenuity(精巧,独创性). Some of the bones found in the cave of Makapansgat in South Africa show signs of being【C9】______ broken and divided into types suitable for different purposes as tools. Tools also enabled humans to【C10】______ food in specially made containers of wood or baskets, so that times of shortage could be lived through more easily.
【C7】
选项
A、meanwhile
B、but
C、as
D、while
答案
D
解析
空格处需要的是一个连词,体现两个分句的关系。A项meanwhile是一个副词,不能引导一个句子,首先从语法上就可以被排除。C项as作为连词可以表示原因或者表示两者相像,不符合句意。B项but和D项while都表示转折,但B项but表示很强烈的转折,比如两者相反,而D项while表示"然而"之意时,只是轻微的口气改变,强调对比之意,表示的是一种并列。根据句意,正确的选项是D项while。
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