Do you think _____ possible to work out a correct figure of the income that the Expo will bring to China?
You can’t _____ until tomorrow morning after the blood examination.
We’re trying our best to get our English _____.
Though some foreign scientists had a ______ opinion of his new invention, his fellow workers never thought ____ of it.
_____ people who buy IBM PC686 is larger than ever before.
The poor boy is in danger. We should do all we _____ help him out.