The Great Wall travels______ deep valleys, _____ deserts and______ mountains.
| A．over; across; through | B．through; across; over |
| C．across; over; through | D．through; across; across |
BP will continue to be focused on making sure that the costs ________with oil spill cleanup in the Gulf of Mexico are paid.
| A．covered | B．filled | C．occupied | D．associated |
. Common people always hold the view the experts say is right.
| A．what that | B．that what | C．that | D．all which |
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 |