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Regular walking has many health benefits, including reducing our risk of heart diseases, type 2 diabetes and depression. Best of all, it's free. We can do it anywhere and, for most of us, it's easy to fit into our daily activities.

We often hear 10,000 as the golden number of steps to walk in a day. But do we really need to take 10,000 steps a day? Not necessarily. This figure was firstly popularized as part of a marketing campaign, and has got some criticism. But if it gets you walking more, it might be a good goal to work towards.

Where did 10,000 come from? The 10,000 steps idea was firstly formed in Japan in the lead-up to the 1964 Tokyo Olympics. There was no real evidence to support this number. Instead, it was a marketing strategy to sell step counters.

There was very little interest in the idea until the turn of the century, when the idea was revisited by Australian health promotion researchers in 2001 to encourage people to be more active.

Based on more evidence, many physical activity guidelines around the world including the Australian guidelines recommend at least 150 minutes of physical activity a week. This is the same to 30 minutes on most days. A half hour of activity is to about 3,000 to 4,000 steps at a moderate pace.

1.Which of the following is not the advantage of walking?

A It can help treat heart diseases.

B It can reduce the risk of depression.

C It’s free and can be done anywhere.

D It can help to cure type 2 diabetes.

解析：选D。细节理解题。根据第一段可知，日常散步对健康有很多好处，包括降低得心脏病、II型糖尿病和抑郁症的风险，并不是说能治愈II型糖尿病，故选D。

2.Why was the idea of 10,000 steps a day formed?

A To encourage people to be more active.

B To promote sales of step counters.

C To help treat different kinds of diseases.

D To attract more people to attend the Olympics.

解析：选B。推理判断题。根据第三段最后一句Instead, it was a marketing strategy to sell step counters.可知每天一万步这个说法是为了促进计步器的销售，故选B。

3.How many steps can you walk in a minute at a moderate pace?

A 50-70.

B 100-140.

C 3000-4000.

D 6000-8000.

解析：选B。细节理解题。根据最后一段最后一句A half hour of activity is to about 3,000 to 4,000 steps at a moderate pace.可知半个小时适中的步伐可以走三四千步，因此每分钟可以走100-140步，故选B。

4.What is the main idea of this passage?

A The idea of 10000 steps a day was a commercial strategy.

B The benefits of walking are much more than we know.

C The idea of 10000 steps a day has no scientific evidence.

D We can walk more to help treat diseases.

解析：选C。主旨大意题。本文主要是讲每天一万步的说法很流行，并介绍了这个说法的起源和流行，但是这些说法都是没有依据的，故本文主要内容是说每天一万步的说法是没有科学依据的，故选C。