6. _________ industries， inventions， and communal endeavors of the Shakers， the best known is their fine furniture.

　　A. Of the many

　　B. Their many

　　C. Are the many

　　D. Many of the

　　答案：A

　　分析：倒装结构。当prep短语位于句首，且谓语动词为系动词时，则引起倒装。

　　参考译文：在基督震荡教徒所参与很多工业、发明创造和社区建设中，最闻名的是他们做的优质家具了。

　　7. Most fishes and many reptiles have ribs along most of the spine， but in mammals _________ only in the chest area.

　　A. they are found

　　B. finding them

　　C. in which they are found

　　D. are found

　　答案：A

　　分析：缺主语和谓语。该句不是定语从句。

　　参考译文：大多数鱼类和很多爬行动物沿着大部分脊柱都长有肋骨，但哺乳动物的肋骨只长在胸部位置。

　　8. Although the habitat of the American beech tree is now confined to the eastern United States and southeastern Canada， _________ extended as far west as California.

　　A. where it once

　　B. once

　　C. it once

　　D. and once

　　答案：C

　　分析：缺主语。A，D中的where， and 多余。

　　参考译文：尽管美国山毛榉树的生长地现在只限制在美东和加拿大东南部的狭窄地带，它曾经都延伸向西生长远到加州的地方。

　　9. Most of North America receives _________ some form of continuous plant cover except in the arid and semiarid Southwest.

　　A. moisture to sustain sufficient

　　B. sufficient moisture to sustain

　　C. to sustain sufficient moisture

　　D. sufficient to sustain moisture

　　答案：B

　　分析：缺宾语。其中形容词修饰名词，不定式表“目的”。A，C，D语序混乱。

　　参考译文：除了干旱和半干旱的西南地区，大部分北美地区通过吸收充足的潮湿而保持一些连续植被的形式。

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