来自守护甜心亚梦酱的问题
many people agree that a knowledge of English is
同上为什么不用in an international trade
1回答
2016-05-19 03:52
many people agree that a knowledge of English is
同上为什么不用in an international trade
第一个空填a. 尽管knowledge是不可数名词,但有时可以加不定冠词,意为"对……有某种程度的了解,掌握/精通....。"; 第二个空不用冠词。trade为不可数名词,通常不用加冠词。