问题
选择题
Friends are those ___make you smile, always open their hearts to you and encourage you to succeed.
A．which
B．what
C．whom
D．who
答案
答案：D
考查关系代词。句意为：朋友就是那些让你微笑，总是向你敞开心扉并鼓励你成功的人。先行词those在这里指人，并且在从句中做主语，所以要用who。故选D。