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Afteryearsofcarefulobservationinthewild,JaneGoodallwasfinallyabletothesocialsystemofchimps.[]A.carryoutB.workoutC.lookoutD.pickout

题目详情
After years of careful observation in the wild, Jane Goodall was finally able to _____ the social
system of chimps. 
[     ]
A. carry out          
B. work out          
C. look out          
D. pick out
▼优质解答
答案和解析
B