Many people agree that _________ knowledge of English is ________ must in international trade today....
2022-11-02 14:54:39 24次 2014-2015学年浙江余姚中学高二4月月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Many people agree that _________ knowledge of English is ________ must in international trade today.
A. a; the B. 不填；不填
C. a; 不填 D. a; a
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