________ time at Beijing Normal University, I am very impressed with the quality of the teachers and students.
Is it to hold the 2010 World Exhibition _______ makes Shanghai the focus of the world?
We can never expect________bluer sky unless we create___________less polluted world.
Mike ______ have known the solutions to this problem, or he would have told us.
The confidence of the Chinese film makers ______ by Avatar, the release of______ has not only set a good example for the Chinese film industry but also embarrassed our directors, who lack professional ethics.
The policeman told me that I had passed the driving test and never in my life ______ so happy and excited.