问题
I met my teacher _____ I was walking in the street, but I didn’t say hello to him.
A:before
B:after
C:until
D:while;
B:after
C:until
D:while;
正确答案是：
同类题型
We have produced 15% more cotton this year____ we did last year
He __________ his sight ten years ago.Since then he has been blind.
gh the Eiffel Tower ______ to last for 20 years,it is still standing today.
The young man is a friend of mine.
The new group of students is better-behaved than the other group who stayed here _____