英文用字與用法

1. 請問 profit與profitability除了有可數與不可數名詞的差別且profit的片語和例句很多之外, 這兩字用法上的差異? 2. 我在一則比賽的評審們的對話上看到"He didn't give enough evidence to support his points. I gave him an 87." 為什麼87前面要多個冠詞呢? 3. "American high schools usually teach to the middle which allows many of America's brightest to breeze through... show more 1. 請問 profit與profitability除了有可數與不可數名詞的差別且profi... 這兩字用法上的差異?
2. 我在一則比賽的評審們的對話上看到"He didn't give enough evidence to support his points. I gave him an 87." 為什麼87前面要多個冠詞呢?
3. "American high schools usually teach to the middle which allows many of America's brightest to breeze through high school with little effort." 請問這句裡teach後面有to與沒有to語意上的差別? 還有, which前面是否應該多個逗點?
4.我在一篇"關係子句的限定與非限定用法"其中的例句解說有些疑問:
(A) Make good use of your talent, which may bring you a promising future.
(B) Make good use of your talent which may bring you a promising future.
(A)句裡的which到底是指前面的talent,還是指整個前半句?
(A)句與(B)句的中文翻譯應分別怎麼翻才好?
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