It was the largest experiment we had ever had; it _____ six hours.
Many foreigners, who used to have a strong________against China, come to realize what a country China really is after the 2008 Beijing Olympics.
There were no roads accessible to the earthquaks—stricken town and food_________had to be dropped by parachute.
.As long as we are united, there will be no difficulty in the world that we can’t__________.
So________ was the boy in the game he was playing online that he could feel neither sleepy nor hungry.
He always______ my kindness and borrows money from me, but never has he paid me back.