Mr. Arman admitted that he had been ______ surprised by the high volume of sales his company had generated last quarter.
 
【正确答案】 B
【答案解析】 空格出现在be动词和过去分词之间时,把副词当作正确答案的首位候补来分析句意。选项中只有意为“非常地,完全地”的throughly为副词,而且将其放在空格处也符合句意。