Change, or the ability to【C1】______oneself to a changing environment is essential【C2】______evolution. The farmer whose land is r

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问题     Change, or the ability to【C1】______oneself to a changing environment is essential【C2】______evolution. The farmer whose land is required for housing or industry must adapt himself; he can transfer to another place and master the problems【C3】______to it; he can change his occupation, perhaps【C4】______a period of training; or he can starve to death. A nation which can’t adapt its trade or defense requirements to【C5】______world conditions faces an economic and military disaster. Nothing is fixed and permanently stable. 【C6】______must be movement forward, which is progress of a sort, and movement backward, which is decay and deterioration.
    In a changing world, tradition can be a force for good or for evil. 【C7】______long as it offers a guide, it helps the ignorant and the uninformed to take a step【C8】______and, thereby adapt themselves to【C9】______circumstances. But if we make an idol of tradition, it ceases to be a guide. It becomes an obstacle【C10】______on the path of course. Man is to accept the help which tradition can give but to be well aware of its limitations in a changing world.
【C7】

选项 A、Since
B、As
C、After
D、Before

答案B

解析 as(so)long as为短语连接词,意为“只要”,引导条件状语从句。其他3项都不是短语连词,而且词义也不通。
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