2. 考研
  3. Change, or the ability to【31】oneself to a changing environment is essential【32】evolution. The farmer whose land is required for

Change, or the ability to【31】oneself to a changing environment is essential【32】evolution. The farmer whose land is required for

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问题     Change, or the ability to【31】oneself to a changing environment is essential【32】evolution. The farmer whose land is required for housing or industry must adapt himself: he can transfer to another place and master the problems【33】to it; he can change his occupation, perhaps【34】a period of training; or he can starve to death. A nation which can’t adapt its trade or defense requirements to【35】world conditions faces an economic and military disaster. Nothing is fixed and permanently stable.【36】must be movement  forward, which is progress of a sort, and movement backward, which is decay and deterioration.
    In a changing world, traction can be a force for good or for evil.【37】long as it offers a guide, it helps the ignorant and the uninformed to take a step【38】and, thereby adapt themselves to【39】circumstances. But if we make an idol of tradition, it ceases to be a guide. It becomes an obstacle【40】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.
选项 A、Since
B、As
C、After
D、Before
答案B
解析 is (so)long as为短语连接词，意为“只要”，引导条件状语从句。其他三项都不是短语连词，而且词义也不通。
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