Unless ________ , the murderer is likely to commit similar or further offences.
| A．to arrest | B．arrested | C．been arrested | D．arresting |
. It is the first time that Chinese astronaut Wang Yue________as one of the volunteers for the Mars-500 test project .
| A．has been selected | B．had been selected | C．has selected | D．selected |
Among the most important questions the journalists wanted _____was how Greece could overcome economic crisis ?
| A．to answer | B．being answered | C．answering | D．answered |
It is most _____that the environmentalists will come to the area to investigate the possible damage caused by the serious pollution.
| A．likely | B．perhaps | C．possibly | D．probably |
After winning war in Iraq，the country fell into new worries of economy．
| A．the; the | B．a; the | C．the; ／ | D．a; ／ |