专四
A．were canceled
B．had been canceled
C．having canceled
D．having been canceled
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]。
你可能感兴趣的试题
A．should he
B． ought he
C． shouldn't he
D． oughtn't he
A． an attribute
B． an adverbial
C． a subject complement
D． an object
A． as many books twice
B． as twice many books
C． many as twice books
D． twice as many books
最新试题
Write on ANSWER SHEET THREE a note of about 50-60 words base
In some countries young people are encouraged to work or tra
What does the author suggest as the primary factor of formi
What would the author benefit from the habit?
The author would read the words aloud _________．
What was the first new habit that the author would accompli
根据以下资料，回答题：
Dried foods
Nowadays vegetables are most commonly dried
Alkaline solutions are used to