On December 28, 2009, a terrible tsunami happened in the coasts of South and Southeast Asia, _______ over 25,0000 people.  

What is the way George thought of _______ enough money to buy the house?

．Was it ______ Expo 2010 that made Shanghai the focus of the world then?

Under the environment of fierce competition, the only way John could imagine____stress was to get tougher by making greater efforts.

Everyone in our class works as hard as they can ________ to enter a good college.