主语从句什么时候用whether,不太清楚.还有if也能引导吗___the 2000 Olympic Games will be in Beijing is not known yet.A.whether B.If C.Whether D.That

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主语从句什么时候用whether,不太清楚.还有if也能引导吗___the2000OlympicGameswillbeinBeijingisnotknownyet.A.whetherB.IfC.Whe

主语从句什么时候用whether,不太清楚.还有if也能引导吗___the 2000 Olympic Games will be in Beijing is not known yet.A.whether B.If C.Whether D.That
主语从句什么时候用whether,不太清楚.还有if也能引导吗
___the 2000 Olympic Games will be in Beijing is not known yet.A.whether B.If C.Whether D.That

主语从句什么时候用whether,不太清楚.还有if也能引导吗___the 2000 Olympic Games will be in Beijing is not known yet.A.whether B.If C.Whether D.That
只能选C,
if不能跟not连用.

whether 能引导主语从句 if不能

C.
还有whether or not固定搭配