TheGreat Wall is ____ tourist attraction that millions of people pour in everyyear

at the government can lead them out of the financial crisis,people are optimistic about the future of the country.

To help the sick people in the hospital is _____ forme .

Lionel Messi, an Argentina soccer player, _______ the Ballond’Or award (金球奖) for five times.

Most experts agree that human activities such as the clearing of large areas of forests, and farming on a large scale _________ the problem of global warming.