the waiter understood that he didn't want tea.这句中的that可以省略吗?

the waiter understood that he didn't want tea.这句中的that可以省略吗? He was so careless that he didn't see the tea.同义句 这句中的that可以省略吗 It is certain that he will win the match.这句话中的that可以省略吗 (He didn't want the axe,why would he want that )这句话是什么意思 强调句中的that可以省略吗? Do you think everything that he said was ture?句中的that可以省略吗? 这句话中的that可以省略吗? his teacher didn't think he was blight 这是从句吗?怎么看省略了THAT? the chances are (that)中的 the可以省略吗 You told me（that）you didn't have a boyfriend. 这里的that可以省略吗?为 it happened(chanceed) that he was out 中的that可以省略吗?