Despite their of interest, Fleming kept trying to develop the chemical it would be safe and effective.
A. lacking; in order to
B. lack; so that
C. lack; so as to
D. lacking; so that
网友回答
A. lacking; in order to
(答案→)B. lack; so that
C. lack; so as to
D. lacking; so that
解析：
试题分析:考查名词和目的状语。根据their可知后面填名词lack，排除A、D选项；而in order to和so as to后面跟动词原形，so that引导目的状语从句， 由此可知B选项正确。.句意：尽管他们对此缺少兴趣，弗莱明坚持努力去研究这种化学物质，为的是让它更安全有效。