Water, which seems so simple and common, is _____ makes life possible.
| A．that | B．what | C．which | D．how |
—I wonder how much you charge（要价） for your services.
—The first two are freethe third costs￥30.
| A．while | B．until | C．when | D．before |
The discovery of the stolen car led to.
| A．the thief having caught | B．the thief catching |
| C．the thief being caught | D．the thief to be caught |
is known to us all is that the 2012 Olympic Games will take place in London.
| A．It | B．What | C．As | D．Which |
—Is there any possibilityyou could pick me up at the airport?
—No problem.
| A．when | B．that | C．whether | D．what |
When I returned, I found the windows open and something.
| A．to steal | B．stealing | C．stolen | D．being stolen |