1.divide...from... 把...和...分開
That is why the greatest danger of all is to allow new walls to divide us from one another.
這就是為什么最大的危險是讓新的墻將我們彼此分開的原因所在。
2.refuse to do 不肯做...
But his wife must refuse to do so.
不過他太太一定不肯這么做。
3.do me a favor 幫我個忙
Will you do me a favor and tell me how the Internet works?
你能幫我一個忙,給我講講互聯網是怎樣運做的嗎?