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 |
There ______ many people ______ in the office, but now nobody is allowed to.
| A．used to be；smoking | B．used to have；smoking |
| C．used to be；smoke | D．used to have；smoke |
I’m sure Xiaoxiao can ______ a lot of money doing this job and he can ______ a living with the money he earned himself.
| A．have；make | B．make；make | C．make；get | D．get；make |
It is really a challenge for me to finish it. In order not to be disturbed, I spent three days ______ in my study surfing the internet to do the research.
| A．locking | B．locked | C．to lock | D．lock |
The money collected from ticket sales could be ______ food and clothes for the people in the flooded areas.
| A．cost | B．paid off | C．spent on | D．paid back |
In our ______, anyone ______ breaks the law should be punished.
| A．opinions; that | B．opinions; who | C．opinion; he | D．opinion; who |