The boy is always found______in reading books.
| A．to bury | B．burying | C．buried | D．buries |
His promise ______ he would give away half of the year's income to the disabled turned out a lie， ______ made the public feel cheated.
| A．which; what | B．that; which |
| C．what; which | D．which; that |
______ 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 |