71. Scientists have successfully isolated individual apparent genes with single known function.
72. The advance of communication technology is the setback of intimacy of human relationships.
73. This has benefited me, keeping me away from melancholy.
74. These students falsely perceive that, if they do not speak like Americans, they do not speak well, accordingly, they become fearful of speaking itself.
75. To my surprise, Mrs Thomas' advice is really helpful.
76. Does the improvement of living standard necessarily mean that we can look forward to happier life in the future?
77. It takes time for our soul to digest, absorb, and understand emotions and experience.
78. More difficult to determine than how to apply for patent for gene group is whether we have the legitimacy to own human DNA at all.
79. The cellphone, because of its far too mobile features, adds a fresh array of colours to our already comedic life.
80. To his excitement, his family is going to move north to Cleveland（克利夫蘭） soon.