I was ashamed________wasting many hours when I should have been studying.
. ______the zoologists tried to prove was that the photo of the South China Tiger had been staged or technologically dealt with.
. It is______the customers’ needs that has made chain stores so popular in big cities in China.
. Out of the crowded bus______,who was dressed in a black suit and waved to a woman.
. By the time he comes back, I’m sure we ________ all these rooms of the lab. Therefore, he doesn’t have to return.
. ________ their son away to college, the couple got more room in the house.