The plan sounds brilliant! But the difficulty ________ where to find so much money.

问题描述:

The plan sounds brilliant! But the difficulty ________ where to find so much money.
A turns in B lies inC cuts inD lays in
为什么选B,请分析,谢谢

B lies in “在于”
这个计划听起来很好,但困难【在于】到哪去找这么多钱呢.其他几个选项什么意思,请说一下,谢谢A turns in上交, 呈交
C cuts in插嘴, 打断
D 没有这样的短语动词,凑数的。