11. The stories Alex Haley heard as a youth inspired him to investigate his material ancestry and using his findings to write his highly successful novel, Roots.

　　(A) ancestry and using his findings

　　(B) ancestry and his findings were used by him

　　(C) ancestry, he used his findings

　　(D) ancestry, and he used his findings

　　(E) ancestry, whose findings were used

　　答案：D

　　类型：句子结构。

　　解析：原句中using没有平行成分，A错。B中，两个并列句，前面用主动，后面用被动，累赘，B错。C是run-on句子，C错。D中and是连词，并列两个完整句子，正确。E改变原句意思，原句中说的是his findings，E选项说的是祖先的发现。

　　12. The Jiaozhou Bay Bridge is among the longest bridges in the world; located in eastern China’s Shandong province, it crossed Jiaozhou Bay, connecting the port city of Qingdao to the island of Huangdao.

　　(A) world; located in eastern China’s Shandong province, it crosses

　　(B) world, located in eastern China’s Shandong province, it crosses

　　(C) world and is located in eastern China’s Shandong province, it crosses

　　(D) world, it is located in eastern China’s Shandong province, crossing

　　(E) world; located in eastern China’s Shandong province, crossing

　　答案：A

　　类型：句子结构

　　解析：A中，分号的作用类似于句号，分号后面是一个状语+主句的结构，A正确。B和A只有一个标点符号的区别，但是world之后用逗号的话，就是run-on句型了。C也是run-on句子。D仍然是run-on句子。E选项中，分号之后的句子没有主语。