Question

Despite their______of interest, Fleming kept trying to develop chemical     ______ it would be safe and effective.

A．lack, so as to	B．lacking, so as to
C．lack, so that	D．lacking, so that

Answer 1

C

试题分析：考查短语用法。Lacking要与介词in连用；名词lack与介词of连用，表示缺少…；so as to后面不能接句子，只能接短语；so that后面接句子。句意：尽管他们缺少兴趣，但是Fleming 还是不停地发展化学品，以至于那些化学品安全有效。故C正确。
点评：Lacking要与介词in连用；名词lack与介词of连用，表示缺少…；so as to后面不能接句子，只能接短语；so that后面接句子。