81.
A) reviews B) reference
C) reaction D) recommendation
82.A) In a word B) In a sense
C) Indeed D) In other words
83.
A) various B) different
C) the higher D) the lower
84.
A) revealed B) exposed
C) engaged D) involved
85.
A) regulations B) formations
C) rules formations D) constitutions
86
A) Although B) Whether
C) Since D) When
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