l really do not know ___l should do that.填连词,并说明为什么?

l really do not know ___l should do that.填连词,并说明为什么? l do not clear what do i really want.actually,l do not know Do not know how to do that?Really Tangled ah 是神马意思? I really do not know about it l don't know whether l should do it or not. Idiots,know that you do not know Brother,do you really think I do not know ah? Sorry,I know that I should not do that,please forgive me,oka I know that you hate me .but I do not really tell a lie with there are so many dresses there that I really do not know __ The little girl really ________(not know)what to do at that he did not know what he should do at that time.改为简单句.he give