What worried the child most was _________ to visit his mother in the hospital.
| A．his not allowing | B．his not being allowed |
| C．his being not allowed | D．having not been allowed |
___________ 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 |
Nuclear radiation is said __________ the biggest health challenge in Japanese Earthquake over the past few months．
| A．being | B．to be | C．to have been | D．that it is |