Helen listened carefully she might discover exactly what John wanted.
A. so as that
B. in order that
C. in order to
D. so as to
网友回答
A. so as that
(答案→)B. in order that
C. in order to
D. so as to
解析：so as that 没有这种用法in order that为了，后面接从句in order to 为了接名词或动名词， so as to以至接名词或动名词，根据题意选B，为了能准确的发现约翰想要的，海伦听得非常认真。