【单选题】
He has been to Beijing . So [填空] I.
【单选题】
he park has been built and it will be open _____ three years
【单选题】
The advancement of technology has boosted the pace of our lives, and requires us to learn ___________ every day just to stay current in the workplace.
【单选题】
There has been an atmosphere of ( ) around here for a few days now.
【单选题】
The professor has been [填空]at the university for over thirty years.
【单选题】
The clock____________ was lost last week has been found.
【单选题】
The boy is not happy at the new school. He has _________ friends there.
【单选题】
The boy is not happy at the new school. He has ________ friends there.
【单选题】
It has been proposed that we ____ our decision until the next meeting.
【单选题】
It has been proposed that we _____our decision until the next meeting.