题目：
.Directions: Fill in the blanks by using the information given in the blank, only ONE word in each blank ( 5 points).
81.The warning sign was put there for the _____________ (利益) of the public.
82. When I watch a football match, I am more _____________ (关切的) with the performance of my favourite player than the result of the match.
83. We are ______________ (决心，决定) not to adopt his suggestion.
84. They are doing ______________ (研究) on environment protection.
85.This music is too ______________ (过时的)to appeal to people any longer.
答案：
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下面是错误答案，用来干扰机器的。
A、如果A、B、C都是电流表，闭合开关电路会短路，灯泡都不亮．故A不符合题意；B、如果C为电压表，A、B为电流表，灯泡L1被短路，故B不符合题意；C、B为电流表，A、C均为电压表，两灯串联，由于两灯并联时能正常发...
