All the flights __________ because of the extremely heavy rain，we had -考呗网题库移动版

单选题All the flights __________ because of the extremely heavy rain，we had to postpone our schedule．

A．were canceled
B．had been canceled
C．having canceled
D．having been canceled

参考答案D

解析:译文：所有航班由于大雨而取消，我们的计划不得不推迟。
独立结构题。通过整句可以判断，前半句应该使用独立结构，具体形式为逻辑主语+非谓语动词，由于动作发生在主句之前，因此用完成时，又由于动词与逻辑主语之间为被动关系，因此选择[D]。

单选题He ought to dismiss the unqualified employees under his supervision, __________?

A．should he
B． ought he
C． shouldn't he
D． oughtn't he

单选题In the sentence “He woke up to findhis house on fire．”, the italicized part is __________．

A． an attribute
B． an adverbial
C． a subject complement
D． an object

单选题The author has written __________ this year as he did last year．

A． as many books twice
B． as twice many books
C． many as twice books
D． twice as many books