When I went in , they were ____ in a heated discussion .
Some people create jobs, foster excitement and basically make the system work. They see possibilities ________ others see only problems.
the new underground is available has not been made clear yet.
It's a common _______ for young people to pay a New Year's visit to their elders.
—Would you mind giving your advice on how to improve our business management? —If you make ____ most of the modern equipment, there will be ____ rise in production.
---Have all the mysteries been cleared up?--- Almost. But ______ only one question ______.