住院的儿童主要的压力来源
A．接触陌生环境
B．中断游戏
C．发生退行性行为
D．疾病所致痛苦
E．恐惧治疗
参考答案：A,D,E
Besides proper diet, exercise is one of the key ___________of a healthy lifestyle.
A．components
B．categories
C．ranges
D．processes
__________ , do you enjoy collecting the ancient coins? [ ]
A. By the way
B. On the way
C. By any way
D. On any way
