问题
选择题
_______ your letter, I am pleased to tell you that you are to receive the answer by the end of this week.
A．Concerned about
B．Concerning
C．Concerning with
D．Concerned
答案
答案：B
Concerning为介词“关于，有关”比about正式。句意为“关于你的信件我很高兴的告诉你这个周末你会得到答复”