A lot of people like running on the treadmills(跑步机). But it is not a good way to make you strong and healthy. Here are 3 reasons why you should run outdoors but not on the treadmills.

1. Treadmills are expensive

Treadmills can be expensive. You can run outdoors, and it costs you nothing! Walk outside and the whole world is your treadmill.If you’re willing to get a little dirty,outdoor activities will help you.

2. Treadmills can become boring 

 You are limited to what’s in front of you. Running and exercising outside provides a beautiful scenery . Studies have shown that just looking at photos of nature can lower blood pressure（血压）, so imagine what running through it will do. The fresh air and the unpolluted nature will also make you run easier.

3. You burn more calories running outside than you do on a treadmill

 You burn more calories when you run outdoors, because you have to work harder in order to move your body. While you run on a treadmill, you only move your legs. However, when exercising outside, you must move your legs and your hands and so on.

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1.The passage gives _____reasons not to exercise on the treadmills.

A 1

B 2

C 3

D 4

解析：选C。细节理解题。根据文章三个小点可知,故选C。

2.From the passage we can know treadmills are quite_______.

A cheap

B expensive

C famous

D comfortable

解析：选B。细节理解题。根据文章第2段第一句Treadmills can be expensive.可知，故选B。

3.Looking at the beautiful scenery can lower your_______.

A blood pressure

B heart disease

C toothache

D headache

解析：选A。细节理解题。根据文章第3段第3句Studies have shown that just looking at photos of nature can lower blood pressure 可知，故选A 。

4.Which of the following is not the advantage of running outside?.

A Fresh air

B Running easier.

C Unpolluted nature.

D Making you dirty.

解析：选D。推理判断题。根据第3 段，可知A、B、C都是户外跑步的的益处，D选项弄脏自己则不是，故选D。

5.What’s the best title of the passage?

A Do more exercise

B How to do exercise on the treadmills

C 3 reasons not to run on the treadmills

D Run outdoors, please

解析：选C。主旨大意题。根据第1段第2句Here are 3 reasons why you should run outdoors but not on the treadmills.可知，这是文章的主题句，故选C。