a fair knowledge and experience中的a 有类似这种用法吗?

a fair knowledge and experience中的a 有类似这种用法吗? need a knowledge of有这用法吗?是什么意思? 有have a guess这种用法吗, a few more有这种用法吗? 请问有a knowledge of这个用法吗?在什么情况下 between A,B,C and D 这种用法可以吗 a seven-years child 有类似的用法吗 考察冠词的用法He has a good knowledge of many foreign languages,and a joint venture of The West Group and Fair properties中的prope have a dinner有这种用法正确吗 有 a piece of grassland 这种用法吗? a wide range of knowledge =a wide knowledge吗