Expo 2010 Shanghai has been an extraordinary celebration of global business and culture, and it has also provided a fantastic model for Expo 2015 Milan ____________managing and organizing events of this scale

_________he had only practiced the part a few times; he did it successfully beyond expectation

Where’s my old bike—I_______ to a poor boy.

Most students watch TV three ____ four times a week.

Tom whis attentionwas caught by a bird.