______, I am tired of discussing the troublesome things.

______, I am tired of discussing the troublesome things.
A、In word
B、In a word
C、In words
D、In the word
【正确答案】：B
【题目解析】：In a word“总而言之；总之；一言以蔽之”。 In a word引导总结状语（Summation-conjuncts），类似的词或词组有altogether，overall，then，therefore，thus，all in all，in conclusion，to sum up等。