问题
单项选择题
According to this passage, ______ makes some kind of learning difficult.
A．long distance
B．formality
C．much indulgence
D．family influence
答案
参考答案：D
解析：[分析] 细节题型。 第二段最后一句(The heavy emotional overlay of family relationships makes some kinds of learning difficult．)即为本题中所指的family influence，所以选项D是答案。