单选题 According to the passage, what is the function of "Shadow Cabinet" in Britain?

【正确答案】 A
【答案解析】[解析]细节题。此题的答案在于第二段的第一句中,即 The work of each minister is always kept under observation by an unofficial“Shadow Cabinet”organized by the Opposition.这样我们可以选出A。其余的选项文中均没有提到。