28. I don’t think you’ve quite__the seriousness of the situation. You seem to know nothing about it.
The Internet connection for the entire area _________ when there was a sudden power cut yesterday.
American Indians _________ about five percent of the U.S. Population.
He once remarked that "All happy families ________ one another, but each unhappy family is unhappy in its own way".
China has a good ________ for fighting against the flu with its careful and smooth organization.
Not knowing his address , she had some difficulty ________ his house.