Hurricanes at first begin traveling from east to west, because that direction is the way the prevailing winds in the tropics blow, but they then veer off toward higher latitudes, in many cases changing direction toward the east before dissipating over the colder, more northerly waters or over land.


Hurricanes at first begin traveling from east to west, because that direction is the way the prevailing winds in the tropics blow, but

At first, hurricanes travel from east to west, because that is the direction of the prevailing winds in the tropics, but

While hurricanes travel from east to west at first, the direction of the prevailing winds blowing in the tropics, and

Because hurricanes at first travel from east to west, since it is the direction of the prevailing winds in the tropics,

Hurricanes, beginning by traveling from east to west, because this is the direction of the prevailing winds in the tropics,

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题目分析：总体来说本题难度不大，很多选项可以根据基础的语法知识点进行快速排除。

选项分析：

A选项：begin的意思是“开始”，at first的意思是“起初”。两者的意思在本句中几乎是一样的，因此其中一者必然是赘余的。because后从句的语法结构可能有点难懂。这是一个主系表结构的句子，the way是表语，其身后是一个定语从句。在语法上，当先行词是way时，定语从句经常会省略关系词。还原为正常的从句则有：
that direction is the way in which the prevailing winds in the tropics blow

B选项：Correct. 本选项在语法和逻辑上均是正确的。that是一个代词，这里的指代对象是east to west，中文可以翻译为“那”。

C选项：and是并列连词，一定要连接两个完整的句子（有时会由于省略的现象使得它看起来不是连接句子的，但实质上依然是连接句子。例如：Jack and I went to school。例句中的and真正连接的应该是：Jack went to school and I went to school）。让我们来分析一下本选项的句法结构：首先While hurricanes travel from east to west at first是状语从句，the direction of the prevailing winds blowing in the tropics中没有谓语动词，只能看作一个名词短语，and身后是完整的句子。这造成了严重的语法错误，即，and身前没有主句。

D选项：hurricanes at first travel from east to west和they then veer off toward higher latitudes之间不应该是因果关系，而应该是转折关系；另外，本句在语法结构上也不正确，because应该引导一个原因状语从句，since也会引导一个原因状语从句，理论上两者应该各自摆在距离自己主句最近的地方，如果两者同时修饰一个主句，则应该分别摆在这个主句的两端，不能像本选项一样放在一起。

E选项：本选项开头已经出现了主语hurricanes，在出现谓语动词前又出现了一个主语they，相当于在语法上多了一个主语they。

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