第1个回答 2013-06-18
A. Once] 的习惯位置:You have no further difficulity once you have understood this rule.或者Once句首都可以
不选B是因为:
unless 除非,如果不 (= if…not)
即 若用Unless则该句子意思为 If you have not understood this rule, you have no futher difficulty. 逻辑表达出错。所以,若选B 应是:Unless you have understood this rule, you would have further difficulty.
不是C因为. Only 表达这句话的用法:Only when you have understood this rule, will you have no further difficulty.
不是D. Until ——You have further difficulty until you have understood this rule.
选A本回答被网友采纳
第2个回答 2013-06-18
答案选B
翻译:除非你掌握了规则,以后才不会有难题。
第3个回答 2013-06-18
此题不很好,我认为AC都可以选,不用过分分析了。since表示原因的语气比较一般,because最强,as最弱(用于告诉众所周知的原因),回答why的只能用because. 例如:As China has a large population...由于。。。这个是大家都知道的原因,语气较弱,所以用as和since,如果告诉的是不为人知的原因,多用because He was late for the meeting, because he...
第4个回答 2013-06-18
A. Once.
Once you have understand this rule, you have no further difficulty.
一旦你理解了这个规则,你将没有进一步的困难.
C. Only 不对