find和词组find out的区别如题：we had a difficult time ( )the answer to the question A finding B finding out两个有什么区别

find和词组find out的区别如题：we had a difficult time ( )the answer to the question A finding B finding out两个有什么区别 find out 和 find的区别? find和 find out的区别? “find”和“find out”的区别 find out it和find it out的区别 seek out和find out的区别 find out 和 pick out的区别 discover,invent和find,find out 的区别 discover,find和find out的区别详细点 find,find out,know和look的区别 find ,find out,look for,的区别 find与find out 的区别 discover,find,find out,invent的区别 请问find与find out的区别 find与find out的区别 find out,look for,find的区别 search,search out的区别?find,find out的区别? find out 这个词组里的find是不是vi?