问题

He was just falling asleep _____ there was a loudknock on the door.
A:while
B:when
C:then
D:until
B:when
C:then
D:until
正确答案是:
同类题型
Are you coming to the English evening —I’m not sure. I ________ go to theconcert instead.
Unsatisfied ________ with the payment, he took the job just to get some work experience.
I________there would be afootball match on Channel 8 tomato
I turn theTV and watch a football match .
How was your last summer vacation– __________.I did quite a lot of homework at home.