The Great Wall is __________ tourist attraction that millions of people pour in every year.
He suffered severe headaches as a result of the injury, and hisdoctor recommended he _________ a rest.
—How can we _________ a large amount of fruit in the summer? —By freezing or bottling.
There's a strong possibility _________he'll get promoted. If so, let'scongratulate him.
_________ so busy, she would come to help you.
Without the air to hold some of the sun's heat, the earth at night _________,too cold for us to live.