In the Barcelona Olympic Games, the Chinese team totally got 87 gold medals, __________ 51 were won by women players.
You can’t imagine ________ when they received these nice Christmas presents.
No one can be sure _______ in a million years.
________ the decision must be made immediately requires questioning.
_______caused the accident is still a complete mystery.
________ we can’t get seems better than _______ we have.