All the major cities of the United States,______the cities of the Great Lakes and the Gulf of Mexico, began as centers of trade.

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问题 All the major cities of the United States,______the cities of the Great Lakes and the Gulf of Mexico, began as centers of trade.

选项 A、and to include
B、which including
C、included
D、including

答案D

解析 句意:包括大湖区和墨西哥峡谷的美国所有主要城市都是以贸易中心的模式发展起来的。两个逗号之间是插入语,这里分词作状语,不能使用谓语动词。
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