第3题: [单项选择]So many directors ______, the board meeting had to be put off. A. were absent B. being absent C. been absent D. had been absent 参考答案:B 答案解析:在句号前不能出现两个既不是并列关系也不是从属关系的句子,换句话说,同一个句号前不能出现两个既不是并列也不是从属关系的谓语动词。因此在空格处不能使用谓语动词,但我们可以使用独立主格结构,作状语,表示原因