48. Not until recently have we realized that the increasing world population may lead to a potential gloomy () for humanity: starvation.

41. When employees participated in the problem-solving process, they were much more willing to () solutions to the problems.

40. People who work in offices are () as “white-collar workers” for the simple reason that they traditionally wear a white shirt with a collar and a tie to go to work.

39. The “discipline” message asks people to save, while the“enjoy yourself” message asks people to spend; therefore, they () each other.

38. She authorized her partner to carry out the daily responsibilities () when she was on her business trip.

37. When the police caught up with him, Mr. Foster had to () that he’d broken the speed limit.

36. As the result of her divorce, she was obviously () the double burden of playing the role of both mother and father.

35. This symbol of Chinese () for 5,000 years implies the national spiritof courage and determination.

34. His efficiency in doing things is a sign of being () to solve aproblem or fulfill a job successfully with speed.

33. Upon seeing the surprise gift, she couldn’t help but (), “This is themost beautiful necklace I’ve ever seen!”

32.For those suffering from fatigue and poor performance, it is() to eat red meat since it contains rich iron.