She looks sad. Could you please tell me ____ that prevents her from being as happy as before?
| A．what it is | B．it is what | C．how it is | D．it is how |
The wine industry in the area has developed in a special way, ____ little foreign ownership.
| A．by | B．of | C．with | D．from |
All of them try to use the power of the workstation ___ information in a more effective way.
| A．presenting | B．presented | C．being presented | D．to present |
The way the guests ___ in the hotel influenced their evaluation of the service.
| A．treated | B．were treated | C．would treat | D．would be treated |
–What do you think of teaching, Bob?
–I find it fun and challenging. It is a job ___ you are doing something serious but interesting.
| A．where | B．Which | C．When | D．that |
One of the few things you ___ say about English people with certainty is that they talk a lot about the weather.
| A．need | B．must | C．should | D．can |