Dr.BrosnanandDr.deWaalhaveeventuallyfoundintheirstudythatthemonkeys________.
[A]prefergrapestocucumbers
[B]canbetaughttoexchangethings
[C]willnotbecooperativeiffeelingcheated
[D]areunhappywhenseparatedfromothers
正确答案:C
Dr.BrosnanandDr.deWaalhaveeventuallyfoundintheirstudythatthemonkeys________.
[A]prefergrapestocucumbers
[B]canbetaughttoexchangethings
[C]willnotbecooperativeiffeelingcheated
[D]areunhappywhenseparatedfromothers
正确答案:C