She is the ____________(主唱) in the concert.
We humans are hoping to live on the moon ___________(有朝一日).
He ___________(离开) yesterday. He has gone to Shanghai.
We have lived in the countryside ______________(在过去的几年里).
We went to the airport to _____________(与……告别) Mr Green.
_____________(一半的) the students have been to the museum.