I think good knowledge of English is great help when you are traveling around th

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

试题答案

B

解析:

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。