As the twentieth century, come to a close, the raw. materials for a great national literature were at hand, waiting_______.
| A．to use | B．to be used | C．to have used | D．to be using |
______ the rising house prices will be under control is what worries people most.
| A．What | B．Whether |
| C．That | D．Why |
No one really knows exactly when the first group of people arrived in ______ we now know as California.
| A．what | B．when |
| C．where | D．which |
Some experts think the wolfs team spirit for survival is ______ is needed in today's competitive culture.
| A．that | B．what |
| C．which | D．how |
Many experts believe that teachers' development is ______ the key to better education lies.
| A．that | B．what |
| C．where | D．which |
Great honors will be given to ______ have successfully rescued the victims of the earthquake.
| A．those who | B．whoever |
| C．who | D．whom |