Complete each of the following sentences with a (compound) word derived from the one(s) given in brackets.
However hard they tried, they couldn’t overcome the （ ）differences between them. (deep, root)
【正确答案】：DEEP-ROOTED
【题目解析】：
不管他们多么努力，他们无法克服他们之间根深蒂固的差异。deep-rooted 根深蒂固的，形容词。