By nine o'clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, ___________ appeared a rare rainbow soon.
| A．of which | B．on which | C．from which | D．above which |
I find that looking after children is a fun and challenging job ___________ you need to be patient and careful．
| A．That | B．which | C．where | D．when |
___________ we can have clean drinking water lies in ___________ effective measures will be taken by the government about water pollution.
| A．Whether；that | B．If；that |
| C．Whether；what | D．If；what |
It was ____________ she lost her job ____________ she realized how important it is that one should study all the time．
| A．not until；that | B．not until；which |
| C．not until；what | D．until；when |
Hurricane Sandy,one of the biggest storms ever， hit the East Coast of the US on Oct. 29，___________ transportation．
| A．shutting down | B．to shut down |
| C．shut down | D．to have shut down |
In spite of the advanced medical technology,many Americans have no ___________ to health care．
| A．access | B．entrance | C．introduction | D．devotion |