That is the reason ___she can't say 空 里为什么不能填which?

That is the reason ___she can't say 空 里为什么不能填which? That is the reason ___ he can't say. The girl to 空 I spoke just now is my sister.空里为什么不能填who或that This is the reason which I was late for .这里的引导词能用that吗?若不能,是 The reason that I can't export to France was?还是is? I can't say which wine is the best---it's a/an ___of persona This is the reason—— he didn"t come to the meeting 为什么不用that 不能说的秘密英文The secret that cannot say和Can't say secret哪个更对? That is the only thing (that which who) can't be forgotten i This the reason she told me reason 之后为什么填that或不用填 英语主语从句求助______watch is lost is unknown.那个空为什么不能填that而填whose, The reason ...is that 中的that能否省略 为什么?