_____ ashes from the volcano in Iceland have caused problems for air traffic and business, scientists don't think it will have long-term effects on human health.
| A．Since | B．As | C．While | D．Because |
The Sydney Opera House, which _________ almost 900 rooms and halls of different sizes, is definitely at the top of our list when we travel to Australia.
| A．consists of | B．makes up |
| C．composes of | D．combines with |
In a foreign company, if you have a good command of English, you _________ much more easily.
| A．will promote | B．promote |
| C．will get promoted | D．are promoted |
During the reconstruction of the city, many modern tall buildings went up _________ old shabby houses were torn down.
| A．where | B．in what |
| C．in which | D．Which |
If I were rich, I should help them out. _________，I can do nothing.
| A．As is often the case | B．As is it |
| C．As the case is often | D．As it is |
I don't think Maria will be disappointed at the news, but I will see her _________ she is.
| A．as if | B．so that |
| C．in case | D．even though |