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二、介词
介词是考试中出现的比较多的一个部分，而其中考的最多的就是介词的固定搭配问题。由于篇幅问题，我们在这里仅仅举出几个例题，在说明书手册中我们完整的列出了所有的介词搭配，这些列出的搭配在以前的语法题中出现过，只不过有的时候是正确的选项，有的时候重复考。 (一) 介词搭配
例：The teeth in the upper jaw function together those
A B C
in the lower jaw to cut, tear, and grind food.
D
分析：和…一起，应该为together with，C错
例：The Allegheny Mountain range is rich of coal.
A B CD
分析：B错改为be rich in
例：The rotation of the Earth on its axis is responsible to the
A BC
alternation of periods of light and darkness.
D
分析：C错，应改为responsible for。形容词responsible后接名词作宾语时要加介词for。 (二) 最重要的两个介词 1、介词of 多余或者遗漏
例：Mosquitoes usually lay eggs, singly or in batches, on top stagnant water.
ABC D
分析：D错，应改为top of stagnant。on top of …是因定表达法，意为“在…上面”。
例：Christopher Plummer is a Canadian actor who has
AB
starred in stage, television, and film productions on
C
both sides the Atlantic Ocean.
D
分析：D错，应改为sides of the。 sides为名词，the Atlantic Ocean也是名词，中间明显少了一个介词。 2、介词by
一种情况表示被动，be+过去分词+by，另一种表示通过……的方式， by doing
例：The ceremony of marriage in the United States
A B
can be performed from a justice of the peace.
C D
分析：D错，应改为performed by。谓语动词是被动式，performed的动作执行者应该由介词by来引导。
例：Along the east coast ,American Indian women's councils
A
could veto a declaration of war at refusing to
B C D
supply moccasins and field rations.
分析：D错，应改为by refusing。通过拒绝提供鞋子和粮食，表示通过某种方式做某事要用介词by,故将at refusing 改为by refusing。
例：Algebra is the branch of mathematics concerned with
A
operations on sets of numbers or other elements
BC
that are often represented at symbols.
D
分析：D错，应改为by。动作的发出者应该用介词by来引导 | 
