应用文格式与功能句 — 英语词汇题
题目
在一封写给大学图书馆馆长的正式投诉信中，首段需点明写作目的并保持正式语域。空白处最佳选项是：I am writing to ______ about the noise in the reading room, which has affected my study.
A. express my dissatisfaction
B. just complain that it's awful
C. say I really can't stand it
D. tell you to fix it right now