73. 在本世纪，英语已经变得越来越重要；它已经成为数以百万计人们的第二语言。

74. 相比之下，在1988年发生于美国的一次具有相同等级的地震造成25,000丧生。

75. 新型设计应该是经常发生地震的城市更加安全。

76. I used to waste a lot of time playing games.

77. Your plan sounds great in theory, but will it work in practice?

78. The little girl’s songs brought sunshine/ happiness to the old man and helped him to bear the hardships of life. 79. The stubborn boy refused to listen to the advice of his parents.

80. As long as you keep working hard through your life, you will recall your past with satisfaction.