on the main street, the market was busy yesterday.
A. Located
B. locating
C. being located
D. to be located
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(答案→)A. Located
B. locating
C. being located
D. to be located
解析：考查非谓语动词。主句的主语与locate之间构成The market is located on…系表结构，表状态。而这里是分词作原因状语，故A正确。