When ___basketball, you should be careful not to hurt yourself.
| A．play | B．playing | C．to play | D．played |
We have every reason to believe that __________ 2008 Beijing Olympic Games will be __________ success.
| A．不填; a | B．the; 不填 | C．the; a | D．a; a |
Polar bears live mostly on __________ sea ice, which they use as __________ platform for hunting seals.
| A．a; a | B．a; the | C．不填; a | D．the; 不填 |
—How about __________ Christmas evening party?
—I should say it was __________ success.
| A．a; a | B．The; a | C．a; 不填 | D．the; 不填 |
I looked under __________ bed and found __________ book I lost last week.
| A．the; a | B．the: the | C．不填; the | D．the; 不填 |
Students should be encouraged to use _____ Internet as _________ resource.
| A．不填; a | B．不填; the | C．the; the | D．the; a |