问题
单项选择题
His emotional problems () from his experiences as a child, I think.
A. stem
B. flourish
C. root
D. sprout
答案
参考答案：A
解析：
词义辨析。
A．stem滋生，阻止，起源，发生：B．flourish茂盛，繁荣，处于活跃/旺盛时期：C．root生根，固定，根源在于(in)，D．sprout萌芽，所以答案为A。