【求助】急,一个英语语法问题44.________,the new medicine is now in mass pr
【求助】急,一个英语语法问题
44.________,the new medicine is now in mass production.
A.With the solved problem
B.With this problem being solved
C.With the problem solved
D.With this problem to solve
正确答案是C,但为什么不是B呢?B的意思是“随着问题被解决”,为什么是错误的,