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Throughout history man has had to accept the fact that all living things mus
Throughout history man has had to accept the fact that all living things mus
游客
2023-07-25
13
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问题
Throughout history man has had to accept the fact that all living things must die, hut people now live longer than they used to. Yet, all【C1】______things still show the effect of aging, which will eventually【C2】______death. The body and the【C3】______, they do not function as well as they【C4】______in childhood and adolescence(青春期). The body provides less【C5】______against disease and is more prone(易于……的)【C6】______accident.
A number of related causes may【C7】______to aging. Some cells of the body have a【C8】______long life, but they are not【C9】______when they die. As a person ages,【C10】______of brain cells and muscle cells decreases. Other body cells did and are replaced by new cells. In an aging person the【C11】______cells may not be as viable(能生存的)or as capable【C12】______growth as those of a young person.
Another factor in aging may be changes within the cells【C13】______Some of the protein chemicals in cells【C14】______known to change【C15】______age and become less elastic. This is why the skin of old people wrinkles and hangs loose. This is also the reason old people shrink in【C19】______. There may be other more important chemical changes in the cells. Some complex cell chemicals.【C17】______DNA and RNA, store and【C18】______information that the cells need. Aging may【C19】______this process and change the information carrying molecules【C20】______they do not transmit the information as well. [br] 【C20】
选项
A、so that
B、providing that
C、in case
D、if
答案
A
解析
本句中前一分句与后一分句构成原因与结果的关系,故选so that. in case,以防,若用于现在时或将来时中,时态正常处理;但若用在过去式中,in case后面通常接should引导的虚拟语气。例:I packed a swimsuit in case I should have time to go to the beach.我把泳衣包起来了,说不定有时间会去海滩。in case of等于if,后接名词,如:In case of fire, break glass.如果失火了,就要马上打破窗户玻璃。in any case在任何情况下,in most cases在大多时候,这些case词组用法都很广泛。providing that, providing, provided that, provided意义相同,同等于if。
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