81. B more than one aspect

82. A it gives the scientist confidence and pleasure in work

83. A easily believe in unchecked statements

84. C scientists's way of thinking and acting

85. B objective

86. A Latin Amercia has long received attention

87. D on a plain

88. C clearer

89. B the emergence of the internet

90. D optimistic

91. B trivial

92. D in the same paragraph

93. D generosity

94. C remember others' words

95. C forgetting details of memorable events

96. D family members and guests

97. C men and women in near Eastern societies

98. A the type of food

99. D social status

100. D culture and manners of eating