Bill , often regarded as one of the best students in his class , _____ to be student who cheated in the exam.
| A．came out | B．let out | C．sent out | D．turned out |
I have not seen him_____ he went to college.
| A．when | B．before | C．as | D．since |
They did not stop fighting_____ there was no enemy left.
| A．until | B．after | C．when | D．since |
I was about to leave my house _____the phone rang.
| A．while | B．when | C．as | D．after |
_____ we were singing, the teacher came in.
| A．Before | B．after | C．As | D．Until |
You like sports_____I’d like to read.
| A．when | B．while | C．but | D．yet |