82. psychological satisfaction　　　　 83. their lives

80. Analyzing /Analysing　　　　　　 81. family and friends

78. a decline / a drop　　　　　　　　 79. depressed and lonely

76. Internet Causing Depression　　　 77. Research finding

75. In the boy’s house shortly after she disappeared last Tuesday.

74. The boy’s mother.

73. Grade 3.

72. A knife and a baseball bat.

56~60　 ABBDC　　 61~65　 DCBDA　 66~70　 DCCBA

71. Because he is to young.

52. far　 53. have　 54. It　　　 55.from