问题
选择题
What seems to be a simple idea always turns out _____ that is hard to put into practice．
A．the one
B．one
C．ones
D．another
答案
B
题目分析：句意：看似简单的想法结果总是成为一个很难实施的想法。这里需要代词代替an idea，用one可以泛指可数名词的单数，the one是特指可数名词单数，ones是泛指可数名词复数，another“另一个”，所以选B。