分类：教育/科学-升学入学-高考
问题：一道英语单选______presentbecausesomeof 
______ present because some of them didn’t know when the meeting would begin.A. All the teachers were not          B. No teachers were        . None of the teachers were         D. All the teachers were这题选哪个？请帮助分析一下
回答：由because some of them did not know when the meeting would begin我们可以知道 有些老师没有来，有些老师来了，所以答案选择A,all the teachers were not present是半否定，不定代词的否定都是半否定，选项B/C是完全的否定，所以不符合语境，选项D 与所给的语境不符