Only after I read the text over again _____ its main idea.
| A．that I knew | B．did I knew | C．1 could know | D．I did know |
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 |
He's the kind of man who is fond of _____ compliments to other men's wives.
| A．paying | B．saying | C．expressing | D．showing |
When a space shuttle has accomplished its _____, it can be ready for another trip in about two weeks.
| A．venture | B．mission | C．commission | D．responsibility |