________all kinds of difficulties,the workers have made rapid progress in the construction of the World Expo 2010 Shanghai.
( ) 16. ----- Has John arrived yet? ----- No, she _______ an hour ago.
( ) 15. The building is ________.
( ) 14. The students handed in their test papers to the teacher _______ .
( ) 13. It’s well known to us all ______ Beijing will _____ the 2008 Olympic Games.
( ) 12. He needs one more stamp before his collection __________.