问题

Upon reaching an ________ age, more often than not, children are encouraged, but not forced, “ to leave the nest.”

A:appropriate
B:adequate
C:automatic
D:accurate

正确答案是：

同类题型

__________for over 3 months, the poor boy was still unconscious[ ]

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nd that complex problems, especiallythose _____ abstract thinking, were best for picking out bright and dullstudents

eptember 2008 , China’s key milestonein space travel_____when Zhai Zhigang conducted the first space walk.