Shall we go to the cinema this evening?—Sorry I can’t. I’m __________ my mum at the airport at 7:00.

There were only a __ number of students in the playground.

As a student, we should keep our classroom ________.

I shall never forget the day ________ Liu Xiang won the gold medal, _________ has a great effect on my life

If you don’t go there, ______．