这句话为什么没有that?

这句话为什么没有that? 平行四边形没有对称轴这句话对不对?为什么? 这句话里面的that可以改成who吗?为什么? It is no surprise that Tom should have won the match,这句话为什么要虚拟汤姆赢了这场比赛，这没有什么可奇怪的 Those who were able took advantage of the opportunities for success and happiness that presentedthemselves.able后为什么没有to?还有请翻译一下这句话. 没有埃及就没有战争,没有叙利亚就没有和平.这句话怎么理解?为什么会有这句话呢?背景是什么? 英语he doubted that she lied about her real age这句话中的that起的什么作用?这句话没有that可以吗？ I believe that this house is for sale.这句话中为什么要用that? I don't like jazz that very much这句话是什么意思为什么一定要有that He was so hard working that in his life time请问这句话为什么加that? there is always something good that comes out of it.这句话为什么用THAT he never gave up struggling for that freedom.这句话为什么加that, 这里的that为什么省略了1.There were three times as many users as (that)in the last year.书上为什么没有that?我感觉应该加上2.The number of the users is 3 times as large as that in the last year.这句话的为什么不可以省? 请问这句话怎么转述?‘ Do you like this book or that one?’ My mother asked me.我想知道this book, that one应该怎样转述?有没有解释啊？为什么这么变？有规律可以遵循吗？ 数0仅仅表示没有,这句话对吗,为什么 “细胞内的生物大分子没有生命”,这句话对吗,为什么? DNA有氢键,RNA没有氢键这句话为什么不对 数0仅仅表示没有这句话对吗?为什么?