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They ______there's lots of opportunities out there, you have to look carefully and you'll find them.
A、are said
B、have said
C、say
D、says
【正确答案】：C
【题目解析】：语法一致原则指主语是单数形式，谓语动词用单数形式；主语是复数形式，谓语用复数形式。