问题
选择题
According to scientists, our mental abilities begin to _______ from the age of 27 after reaching the highest level at 22．
A．decline
B．differ
C．fail
D．shrink
答案
答案：A
题目分析：句意：据科学家研究表明，我们大脑的能力在22岁左右达到最高，从27岁开始逐渐消退。A. decline 衰退，下降，吸引， B. differ不同， C. fail失败，失灵，D. shrink 缩水，选A。