My sister often helps me _______ my lessons.[ ]

Not until the train pulled into the next station ______ that his briefcase had gone.

10 years ago， _________ only one classroom building in our school. And in 10 years， _________ five classroom buildings in our school.

In Japan, people sometimes give special gifts. But they are not open. Later, people may the same gifts to someone else.

_____ do you know about table manners in Korea?[ ]