You should have good knowledge of English if you want to find a job here. Because Englis

问题补充：

You should have good knowledge of English if you want to find a job here. Because English is the working language in most international trade centers.

A. 不填；the

B. 不填；不填

C. a; 不填

D. a; the

答案：

A. 不填；the

B. 不填；不填

(答案→)C. a; 不填

D. a; the

解析：考查冠词用法。固定词组have s good knowledge of…掌握；第二空后的centers是复数形式，前面不要冠词，故C正确。句意：如果你想在这里找到工作，你应该掌握英语。因为在大部分国际会议上英语是工作语言。故C正确。