Question

2. Upon reaching an        age,children are encouraged,but not forced,to "leave the nest".

   A. aggressive   B. appropriate   C. average   D. accessible

Answer 1

2. B句意为："当到了一个恰当的年龄时，孩子会被鼓励而不是强迫'离巢' "appropriate意为"恰当的"，相当于proper,符合题意。