51.  As a student , we should put our efforts mainly into our studies .

52.  Men are mainly fond of sports, alcohol, cigarettes, while women tend to be more interested in dancing, cooking, shopping and dressing.

53.  Many people are keen on it mainly because they can enjoy the beauties of competitors chosen from all over the world.

54.  Men and women are different in many ways and they are mainly different in two aspects.

55.  Frequently, it's widely believed that the advantages of communication are mainly of two respects.

56.  As a result , the man mainly focused on the latter part of the sentence.

57.  As for some people, boys mainly communicate with each other by doing things together, while girls by talking.

58.  In fact, many families immigrate mainly due to the thought of their children's better education.

59.  One of them is that families immigrate for better education, mainly applying to rich families.

60.  From some people's point of view, boys conduct conversations or even built the bridge of friendship mainly by means of being a team member and then working together.