我们先来看几个例子
1. 题目:Research completed in 1982 found that in the United States soil erosion
A reduced the productivity of farmland by20 per cent
B was almost as severe as in India and China
C was causing significant damage to 20 per cent of farmland
D could be reduced by converting cultivated land to meadow or forest
原文:The United States, where the most careful measurements have been done, discovered in 1982 that about one-fifth of its farmland was losing topsoil at a rate likely to diminish the soils productivity.
很明显,原文是一个长句,而对于长句的处理就是找出主干,我们可以看出来,这个句子的主干是The United States discovered in 1982 that about one-fifth of its farmland was losing topsoil。所以答案就非常明显应该选择C。所以你会发现很多考生都会选的A项经过对此长句的分析,它根本就不在此长句的主干,也就是说这是对作者要表达的意思的补充说明。从这里我们可以看出,出题者对干扰项的出题思路,干扰项所在的位置都是定位句子的非主干部分。
2.题目:Paragraph B How the port changes a citys infrastructure
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