问题
选择题
I think ________ good knowledge of English is ________ great help when you are traveling around the world.
A．不填;a
B．a; a
C．a; the
D．a; 不填
答案
答案：B
a knowledge of…“知道/了解….知识、对…熟悉。”如：She has a good knowledge of London. 她对伦敦的情形很熟悉。