单选题 The "cut-off point for the survey" in part. 1 refers to______.

A、 146 billion—the collective worth of the country's richest 1,000 people.
B、 January—the deadline for the survey.
C、 31million—the increase of wealth in just 12 month.
D、 160 billion—the total valve of the wealth of richest 1,000.

【正确答案】 B

【答案解析】[精解] 本题为推理题。在文章的第一段“…reached nearly 146 billion by January，the cut-off point for the survey…”一句中，“the cut-off point for the survey”是January 的同位语，因此B为正确答案。cut-off 原意为“定点，取舍点”，在本句中指“调查的截止日期”。