b. oral language was not fully developed
c. people went hunting or traveling somewhere
d. people were inhabiting in caves
4 It is the authors view that in human civilization agriculture______.
a. is the most important step man has ever made
b. is only less important than the domestication of animals
c. had long been practiced as stated in written history
d. can be ranked in importancewith the invention of machines
5 In the 3rd paragraph, in the regions where it could be practiced, here, it refers to ________
a. increase b. number c. agriculture d. species
6 The pastoral nomads would not have yielded to the agricultural way of life____
a. if it had not been for the benefits brought about by agriculture
b. unless agriculture could provide them with sufficient domesticated animals
c. if agriculture had taken up too large a number of their pastures
d. if they had not found setbacks in their pastoral way of life
7 Written language in its initial stage was found more advantageous in that __
a. it could communicate more accurately than the oral language
b. it had developed from picture language
c. information could be recorded and transmitted
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