It's the reason () he gave.此空有两个答案,请问应该填什么?为什么?还有为什么不能填“why”

That is the reason ___she can't say 空 里为什么不能填which? It's the duck's e_____.应该填什么啊 it's a pity that she _ the game.填什么,为什么填这个 It was in the factory_____my father worked.答案是where,为什么不能填th --what's this?--_____is a pen.为什么要填these?为什么不能填it? It's time for you _____ (change)your lifestyle.应该填什么词,为什么? what( ) lovely weather it is 为什么不能填the It ___(get) warmer and warmer when spring comes.请问应该填什么 ,为什么 This the reason she told me reason 之后为什么填that或不用填 应该填什么?为什么?  The s___ that he gave helped me out填什么? The reason why they__leave wasn't explained to us 中间的哪个空应该填哪