21. In the face of widespread concern about environmental waste, compact disc manufacturers are attempting to find a replacement for the disposable plastic box in which they package their product. (A) the disposable plastic box in which they correct (B) the disposable plastic box where they LZM的解释是说:根据GMAT公理,in which 总比 where来的好,所以排除。我在这里小抗议一下,不是这样的。OG里面我记得很清楚,where and in which are interchangable when they indicate a place. 如果不是指代一个地点名词就绝对不可以用where。我想这里是因为box不是地点,所以不用where的。大家参考看看。 (C) a disposable plastic box in which to 从句意上看,这种盒子实现有的,并用于包装特定产品的,显然应当使用特指,因而要在box前面加the (D) disposable plastic boxes inside which they inside代词使用不正确 (E) the disposable plastic boxes in which to 使用了boxes而不是box,改变了原意,好像说的是某一批盒子,而不是特定的某一种盒子。the box是全集,the boxes 是 the box的一个子集。 另外我自己在这里补种一下,in which to 这种用法是很别扭的,还原回去就是:To package their product in the disposable plastic box,着里面的to根本没有动作发出者,这在GMAT当中是个忌讳,代词指代不明和这种错误都是硬伤,因此综上就选A了。 大家继续加油!!