An old lady came ______ to the bus stop, only _______ the bus had gone.
_______the Teachers’ Day ,the students are cleaning the classroom.
I need to get another dictionary, because cover is dirty and page is missing.
—I often see him working hard in his spare time. —________he has won the scholarship from time to time.
Years ago we didn't know this, but recent science study ________that people who don't sleep well soon get ill.
Is it only on the world market ________we can prove the competitiveness and quality of our goods?