问题
选择题
I have been living in London for more than ten years, so I have ________ good knowledge of this city.
A．/
B．the
C．a
D．an
答案
C
题目分析：句意：我住在伦敦10多年了，我对这个城市非常了解。knowledge,名词，知道，了解，have a good knowledge of是一个固定短语，对……非常了解，故选C。