I don't know ____ they have passed the exam.A.what B.if C.wh

I don't know ____ they have passed the exam.A.what B.if C.wh I don’t know _______ they have passed the exam. I don't know___ A that I have passed the exam B if I had pas I don't know _____ they have passed the exam or not I don't _____ they will have the meeting.A.that B.where C.wh 1.They don't know ______their parents are.A that B what C wh i don't know _ good they could have done.A.howB.that C.what 单项选择,3道啊（ ）1.I don't know _____ to do next.A.what B.who C.wh 7.I don’t know _________.A.what to do it B.how to do it C.wh I don't know ____ A what's the meaning of this word B what d they don't have to ____ the uniforms A.wear B.put on C.have I really don't know if they ____ ____a party tomorrow.If the