2021年研究生入学考试英语命题预测试卷(一)

研究生入学考试英语命题预测试卷(一) 研究生入学考试英语命题预测 ___(一) Directions: Read the following text.Choose the best word(s)

研究生入学考试英语命题预测试卷(一) 研究生入学考试英语命题预测 ___(一) Directions: Read the following text.Choose the best word(s) for each numbered blank and ___rk A, B, Cor Don ANSWER SHEET 1.( 10 points ) In the past few decades, re ___rkable findings have been ___de in ethology, the study of ani ___l social behavior. Earlier scientists had 1that nonhu ___n social life was almost totally instinctive or fixed by geics. Much more careful observation has shown that 2variation ours among the social ties of most species, showing that learning is a part of social life. That is, the 3are not solely fixed by the genes. 4，the learning that ours is often at an early age in apro ___ss that is called imprinting. Imprinting is clearly 5 instinctive, but it is not quite like the learning of hu ___ns; it is something in between the two. An illustration best 6the nature of imprinting. On ___, biologists thought that ducklings followed the mother duck because of instincts. Now we know that, shortly 7they hatch,