Mary wrote books to earn money while John gained his wealth _________ selling Mary’s works.
Although cats can’t see in complete darkness, their eyes are much more__________to light than human eyes.
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.