语法与词汇 7.The chairman of the company said that new techniques had______improved their production efficiency.
【正确答案】 D
【答案解析】副词形异义异辨析。radically意为“从根本上，在基本方面，彻底地，本质上”，如：Attitudes towards education should change radically．对于教育的态度应该彻底改变。