I think good knowledge of English is great help when you are traveling around the world.

发布时间：2020-08-17 11:44:06

I think      good knowledge of English is      great help when you are traveling around the world.
A. X，a
B. a，a
C. a，the
D. a，x

网友回答

(答案→)A. X，a
B. a，a
C. a，the
D. a，x
解析：a knowledge of 指哪一门学科知识，这个时候可数；动词用做名词，前面经常使用冠词a .
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