1. _________， domesticated grapes grow in clusters， range in color from pale green to black， and contain sugar in varying quantities.

　　A. Their botanical classification as berries

　　B. Although their botanical classification as berries

　　C. Because berries being their botanical classification

　　D. Classified botanically as berries

　　答案：D

　　分析：句子的主语是grapes ， 后面是平行结构grow…， range…， and contain…。空格后的句子已完整，那么空格处就应该是同位语，状语从句，分词等修饰成分。A中Their指代不明，而且classification和berries也不相符，错;B中Although为conj.，后面应该是完整句，错;C中Because为conj.，后面应该是完整句，错。

　　参考译文：培植的葡萄的植物分类跟浆果是一样的，它们成串的长在树上，颜色从灰白色到黑色，并且包含由不同数量的糖份。

　　2. The cymbal is ________ in the military band and is also frequently used in modern orchestral music.

　　A. a basic instrument

　　B. basic instrument

　　C. how basic an instrument it is

　　D. as an instrument is basic

　　答案：A

　　分析：instrument可数，前面应该有限定词a.and前为一简单句。

　　参考译文：铙钹在军乐队里是一个基本的乐器，而且还经常在现代管弦乐里使用。

　　3. In instrumentalist philosophy， ideas and knowledge are exclusively functional processes： they are of significance only _________ instrumental in the development of experience.

　　A. as they are

　　B. are they

　　C. there are

　　D. are

　　答案：A

　　分析：两个谓语需要有一个conj.来连接。一个句子中出现2个谓语且没有连接词就一定错。

　　参考译文：在乐器演奏家的哲学里面，思想和知识是专有排外性的功能性的过程。他们的重要意义仅限于在经验发展的过程中，用于乐器演奏。

　　4. _________ either by cooling or by depriving the fire of oxygen， and most do both.

　　A. Working fire extinguishers

　　B. Fire extinguishers that work

　　C. Fire extinguishers work

　　D. The work of fire extinguishers

　　答案：C

　　分析：空格中缺主谓。A中没有谓语;B中that多余，因为句中只有一个谓语;D也没有谓语。

　　参考译文：灭火器的通过冷却或者减少火中的氧气的方法工作的，大多数时候两个方法都会用到。

　　5. The introduction of mass-production methods enabled many people _________ and gave them an unprecedented amount of mobility.

　　A. to purchase their own automobiles

　　B. their own to purchase automobiles

　　C. to their own purchase automobiles

　　D. own their automobiles to purchase

　　答案：A

　　分析：为固定结构enable sb to do sth.