27.After the bell rings, which indicates the ending of the exam, you ______stay where you are until all your papers are collected.
.— Could you put off the meeting ? — ______. This is the only day everyone is available.
.If you are unable to attend the interview, for________reason, you should inform us immediately.
— Why are there so many people in your village graduating from university? — In no family_______little about the children’s education.
When travelling in buses or trains, we are likely to have conversations _____ we give information or opinions about different things.
_________a written permission, he had to write another letter to the president of the university.