Pigeons adjust to farm life. They adjust to city streets. In cit

Pigeons adjust to farm life. They adjust to city streets. In city streets they peck their livelihoods from garage heaps. (compound-complex sentence)
【正确答案】：Pigeons adjust to farm life and they adjust to city streets where they peck their livelihoods from garage heaps.
【题目解析】：并列复合句就是以至少一个并列连词和至少一个从属连词/关系代副词连接的三个或是三个以上的简单句。并列复合句可能是一个简单句和一个复合句的并列，也可能是一个并列句和一个简单句的复合，也可能是两个复合句的并列，也可能是一个并列句和一个复合句的并列或复合等。就本题而言，我们采用的是第二句和第三句复合后在和第一句并列的方式。