A．old-age sicknes
B．loose family tie
C．poor mental abilitie
D．difficulties in math
参考答案D
解析:细节理解题。听力材料中提到被访者做了两组实验，一组学习英语，一组学习数学。当访问者问到“What about the group who studied mathematics?'’时，被访者回答“There seems to be no doubt that people find maths more difficult as they grow older．Though，why this is so，I cannot say．”由此可以看出，被访者对此无法解释。
你可能喜欢
单选题
Scientists in Brazil have used frog skin to
A．eliminate bacteria．
B．treat burns．
C．speed up recovery．
D．reduce treatment cost．
Scientists in Brazil have used frog skin to
A．eliminate bacteria．
B．treat burns．
C．speed up recovery．
D．reduce treatment cost．
