What made the whole nation sad was that more than 100 miners were buried in the underground coal mine.
Great changes ______ in China in the past 20 years.
The question is ______ it is worth doing.
The students were ____ over the ____ problem, listening to the teacher with a ____ expression on their faces.
---Would you mind my sitting here ____ lunch? ---______.A. and have, No, not at all C. and having, No, thank you.C. to have, Never, go ahead. D. and have, Oh, it’s my pleasure.
It was rude ______ you to stare at the foreigner when he passed by just now.