51.  In a word, studying abroad plays an important role in modern world .

52.  Some of our teachers, the officers who were in charge of the military training of the freshman, and the main role of the party --- the freshman who just came into the campus this month, receiving the military training, were invited.

53.  The word euthanasia came from Greek, eu means good, and thanos means death; thus the total meaning is "a good death" Its positive roles have been recognized by the whole world.

54.  China is a country in which human relationship plays a Decisive role.

55.  Your sleeping pill-proof neighbour Mar 28 Assignment 2Friends I Have Had Friends play an essential role in my life.

56.  It is the spiritual burden that plays the key role.

57.  These four ordinary words act a very important role in preventing crimes from being rampant.

58.  It plays an important role in the social security.

59.  From the title, it is not difficult to tell what important role such machines play in the smooth operation of state government and organizations.

60.  From the comparison between the two countries, you see what an important role the law and its enforcement play in a civilized society.