单选题 1.  It's an ______ difficult problem, which even many professionals cannot work out.
【正确答案】 A
【答案解析】 副词形似义异辨析。exceedingly意为“非常,极其”,如:They were exceedingly generous.他们非常慷慨大方。
   excessively表示“过分地,过度地,过多地”,如:excessively high price价格贵得离谱;exclusively意为“排外地,专有地”,请考生注意此词经常出现在专四考试词汇部分;extensively表示“广阔地,广泛地”。