______ he has made a decision, it is not easy for you to make him change his mind.
| A．Though | B．Unless | C．Until | D．Once |
It’s was in the rice field _____ we had our league meeting.
| A．where | B．that | C．in which | D．on which |
We are living in an age _____ many things are done on computer.
| A．which | B．that | C．who | D．when |
He is the only one of the students who _____ a winner of scholarship for three years.
| A．is | B．are | C．have been | D．has been |
Jim was very happy yesterday because he_____ the book that he wanted.
| A．came up with | B．came across | C．came about | D．came out |
This is one of the problems_____ at the meeting at present.
| A．discussed | B．discussing | C．to be discussing | D．being discussed |