【单选题】
He might have been killed ____ the timely arrival of the ambulance.
【单选题】
He might have been killed _____the timely arrival of the ambulance.
【单选题】
How stupid I have been! Why _______ I do that before?
【单选题】
If the whole program __________ beforehand, a great deal of time and money would have been lost.
【单选题】
The lives of many people have been enriched_________ adult education.
【多选题】
The lives of many people have been enriched_________ adult education.
【单选题】
The sandwhich course, [填空]I have been on for a week ,is really excellent.
【单选题】
—Who broke the window ? —Not me. It must have been ____ else.
【判断题】
I appreciated to have sent to the United States to study five years ago.
【单选题】
I came to?Beijing?in 1991 and have been ?[填空] here ever since.