问题
选择题
Barack Obama is the US president ________ always makes really exciting speeches.
A. who B. whose C. which
答案
答案：A
题目分析：A. who谁，引导从句代替人，B. whose 谁的，C. which哪一个，引导从句代替物。句意：奥巴马是一位总是能做出令人兴奋的演讲的美国总统。 本句中who引导的定语从句修饰先行词the US president，并且who要在从句中作主语。故选A。
