摘要：
例句:Itisconceivablethatknowledgeplaysanimportantro leinourlife.可想而知,知识在我们的一生中扮演一个重要的角色.20.T... 例句:It is conceivable that knowledge plays an important role in our life.
可想而知,知识在我们的一生中扮演一个重要的角色.
20. That is the reason why ~~~ （那就是...的原因）
例句:Summer is sultry. That is the reason why I don't like it.
夏天很燠热.那就是我不喜欢它的原因.
21. For the past + 时间,S + 现在完成时...（过去...年来,...一直...）
例句:For the past two years, I have been busy preparing for the examination.
过去两年来,我一直忙着准备考试.
22. Since + S + 过去式,S + 现在完成时…
例句:Since he went to senior high school, he has worked very hard.
自从他上高中,他一直很用功.
23. be based on （以...为基础）
例句:The progress of the society is based on harmony.
社会的进步是以和谐为基础的.
24. spare no effort to + V （不遗余
力的）
