The bell rang ______ the teacher was explaining the experiment to the students.
A: until
B: while
C: after
A: until
B: while
C: after
举一反三
- While she ______ TV in the sitting room, the bell A: watches, rings B: is watching, rang C: was watching, rang
- The teacher didn't leave the shaking building _____ all his students had. A: if B: after C: until D: for
- While she ______ TV in the sitting room , the bell ______ . A: watches … rings B: is watching … rang C: was watching … rang D: watched … was ringing
- While watching television ________. A: the doorbell rang B: the doorbell was rung C: we heard the doorbell ring D: the bell of the door rang
- While watching television, （） A: the doorbell rang B: the bell of the door was ringing C: we heard the doorbell ring D: we rang the doorbell