1 . Pilates (普拉提), yoga and the running machine get all the attention when it comes to popular ways to keep fit. There is, however, a more humble exercise that might not be so attractive, but has all the benefits—walking.

Certified fitness professional Jolynn Jaekel explains, "What I love about walking is that anyone can do it at any age and any fitness level. Plus it is good for your heart, your head and your wallet.”

A recent report detailed the health benefits of walking. The report found that walking regularly to fulfill (执行,履行) the 150 minutes of moderate (适度的) physical exercise every week, recommended by the UK's chief medical officer, could save 37, 000 lives each year.

Scientists at Lawrence Berkeley National Laboratory in California found that quick walking reduced the risk of heart disease more effectively than running. They observed participants aged between 18 and 80 over a six-year period and found that walking reduced the risk of heart disease by 9.3%, while running reduced it by 4. 5%. And there is even more good news: 30 minutes of quick walking over five days could help you sleep easily, according to research by Oregon State University. The study by the university showed that walking helped participants sleep better and feel more alert during the day.

The sooner you get started, the sooner you'll notice the differences in your mind and body. So, go out for your 30-minute walk in a nearby park or green space.

1. What does the underlined word "humble" probably mean in the first paragraph?

A．relaxing	B．plain
C．popular	D．active

2. What does Jolynn Jaekel think of walking?

A．It's loved by people of all ages.

B．It's much healthier than running.

C．It's becoming more and more popular.

D．It's a money-saving physical exercise.

3. What did scientists at Lawrence Berkeley National Laboratory find?

A．Walking helps people with sleep problems.

B．Walking contributes to curing heart disease.

C．Walking is better than running in some cases.

D．Walking 150 minutes per week can save lives.

4. In which section of a newspaper can we read this text?

A．Lifestyle	B．Comment
C．Education	D．Science

2 . Exercise plays a very important role in a healthy lifestyle. But you may not have time or money to go to a gym on a regular basis. Don't worry. Here is good news.     1    

A quick Internet search will turn up thousands of online fitness classes. These classes let you listen to instructions.     2     You can watch videos on your phone, computer or tablet and do the exercises right where you are. All you need is an Internet connection and a space large enough to move around in.

    3     Some focus on stretches and slow movements. Other classes involve fast aerobic activity, while others build muscle strength. Some require equipment such as weights, but others use only your body. That means you can choose a class that does what you like.     4    

Some virtual classes require a membership fee, but some are completely free.

Anyone can post a fitness video on the Internet. Not everyone knows what they are doing.     5     Try to find teachers who are certified by an organization with a good reputation.

Virtual fitness classes feature convenience. You can do a class at any time of day. They are convenient, they are private, and you may even discover a new form of exercise that you enjoy.

A．These classes are mostly free of charge.

B．So don't waste time watching useless videos.

C．And you can try a different one whenever you like.

D．Online fitness exercises take a wide variety of forms.

E．So it is important to think about who is teaching the class.

F．Today's technology let you access fitness from the comfort of your home.

G．Meanwhile, they also let you watch trainers demonstrate how to do exercises.