. The river, ____ are covered with trees, is very long.
| A．which banks | B．of which banks |
| C．whose the banks | D．the banks of which |
The Space Shuttle Columbia broke into pieces over Texas as it returned to the earth on February 1，2003，__________all seven astronauts aboard.
| A．having killed | B．killing |
| C．being killed | D．killed |
—Tom enjoys__________basketball on Sunday afternoons，doesn’t he?
—Yes，he does.But what his sister enjoys__________.
| A．to play；dancing | B．playing；to dance |
| C．to play；to dance | D．playing；is to dance |
__________from the appearance，it is very peaceful；but in fact，a war will break out soon.
| A．Judged | B．Judging | C．Having judged | D．To judge |
Nathalie suggested the problem worth paying attention__________at the meeting.
| A．to be discussed |
| B．to been discussed |
| C．being discussed |
| D．be discussed |
The little boy still needs the __________20 dollars to do with some things __________.
| A．remaining；remained to be settled |
| B．remaining；remaining to be settled |
| C．remained；remained to settle |
| D．remained；remaining to settle |