______by Columbus in 1492,the island, or at least the western part of it now known as Haiti, was the scene of some of the most advanced political developments in the western world_________the eighteenth century, whose success_________the labor of half a million slaves
| A．Discovered ; well in; rested on | B．Discovered; late; relying on |
| C．Discovering; well in; counting on | D．Discovering; lately ;depends on |
The chances of discovering life on Neptune are about a million _____.
| A．at one | B．for one | C．to one | D．against one |
It was _____ by the railway board that the cost of rail fares would be increased by ten percent.
| A．noticed | B．stated | C．suggested | D．noted |
Our Party has always devoted great attention to raising the living _____ of the working people.
| A．cost | B．situation | C．level | D．standard |
. The map was drawn to the standard _____ of 1/100,000, so there was not much detail.
| A．route | B．line | C．rate | D．scale |
Radar enables the pilot of an airliner to take off, fly and land in _____.
| A．danger | B．comfort | C．continuity | D．safety |