1 . When water is cold, people will find it uncomfortable to swim. Wetsuits(潜水服）can help keep people warm.    1    So wetsuits are important. In many water sports, you can find people wearing them.

The wetsuit doesn't have a long history. According to studies, the wetsuit only began during WWII when Italians started wearing wetsuits that were made of rubber. And it was widely believed in 1951, Hugh Bradner began working to improve the equipment.     2    

Now there are many kinds of wetsuits. Contrary to what some may think, wetsuits do not work by keeping the diver(潜水员）dry; they are designed to let water into the suit. This thin layer of water is trapped（保存）between the diver and the suit. And it's allowed to move between the skin of the diver and the inside layer.     3    And it can help keep the diver comfortable during the diving process. That's why it's important to have a nice, tight fit for a wetsuit.

    4    The shorter wetsuit often provides cover for the main part of people's bodies. This kind of wetsuit works well with boating, water skiing, swimming, etc. A longer wetsuit can completely cover the body, including long legs.With more protection for the body, it may be used in cool weather conditions.

Wetsuits can also differ in thickness. They range from about 0. 5mm to 8mm in thickness. It's true that thicker wetsuits are more likely to affect your movement.     5    Generally, the colder the water you plan to dive in, the thicker the wetsuit should be.

A．But they're much better at giving you warmth.

B．As for the difference, wetsuits can differ in size.

C．The history of the wetsuit is an interesting story.

D．This led to the development of a kind of new wetsuit.

E．Many wetsuits are very light and easy to wear and take off.

F．As a result, the water gradually warms up to body temperature.

G．And they can provide protection from the sun and cuts from rocks.

2 . Meetings ________ in the company every two days and he is fed up with them.

A．hold

B．are held

C．are holding

D．were held

3 . Had the calculations been done by hand, all practical value ______ by the time they were finished.

A．had lost

B．would lose

C．would have lost

D．should have lost

4 . Biking is an amazing family activity, but finding a route that can accommodate a wide-range of ages can be a challenge.

Lee McNeil and his family are crazy about biking. They have seven children, from 4 to 24 years old. When looking for a route, they look for enough protection from traffic, good surface condition, easy access and interesting views.

With that in mind, here are some great routes for biking with your whole family, as are suggested by McNeil.

Iron Horse Trail

This is the McNeil family’s favourite ride. The route is 26 miles and goes through the 2.1mile Snoqualmie Tunnel.

“Beautiful views, the thrill the tunnel, and places to stop and watch the rock climbers make it special,” McNeil said. “All our kids have taken their turn at braving the black tunnel bravely for the first time, which we celebrate it at the end of the ride.”

How to get there: If you prefer, check http://bit.ly/Mlt9y4 for more information.

Centennial Trail

The Centennial Trail runs for 23 miles from Snohomish to Bryant. The trail is wide and smooth, and is safe for kids as it is off the roads. A nice stop is Lake Cassidy east of Marysville. A dock on the lake is fun to explore. It also has picnic tables and washrooms for a convenient lunch time stop.

How to get there: The trail can be accessed from a number of trailheads. For a map, go to http://bit.ly/L5qCeY.

Cascade Trail

The Cascade Trail follows an abandoned Burlington Northern railroad grade for 23 miles between Sedro-Woolley and Concrete. Because it’s on a railroad grade, the slope is gentle and it makes for an easy family ride.

McNeil said it is a “beautiful ride up the Skagit Valley, with lots of places to watch wildlife along the river.”

How to get there: Go to http://bit.ly/PR4wOW to see a map showing the trail, parking areas and bus stops .

Other good choices

Snoqualmie Valley Trail: http://l.usa.gov/nWGWO

Guemes Island: http://bit.ly/LJ3RxL

Burke-Gilman Trail: http://l.usa.gov/s33li

1. We can learn from the passage that Lee McNeil ________.

A．has a large family

B．often travels with his family

C．teaches his children how to bike

D．spends lots of money on bike rides

2. Which of the following route do McNeil’s family like best?

A．Cascade Trail	B．Iron Horse Trail
C．Centennial Trail	D．Burke-Gilman Trail

3. If you choose the Centennial Trail, you can ________.

A．see a small valley	B．go through a tunnel
C．have a picnic for lunch	D．watch the rock climbers

4. People who want to get more information about the Cascade Trail can visit ________.

A．http://bit.ly/Mlt9y4	B．http://bit.ly/LJ3RxL
C．http://bit.ly/L5qCeY	D．http://bit.ly/PR4wOW

5. The main purpose of the passage is to ________.

A．ask people to learn from Lee McNeil

B．tell people how to make a family ride

C．introduce some routes for family rides

D．encourage more people to ride bikes

5 . －What about go fishing this weekend, Tim?
－______, and I’ll go swimming.

A．It isn’t my cup of tea

B．It’s all the same to me

C．With pleasure

D．Never mind

6 . Fast walkers may live longer than dawdlers (缓慢的人)— regardless of their weight, a new study suggests.

Researchers at Leicester University analyzed data on 474, 919 people with an average age of 52 in the UK Biobank between 2006 and 2016. They found women who walked briskly had a life expectancy of 86.7 to 87.8 years old, and men who kept up the pace had a life expectancy of 85.2 to 86.8. Slow walkers hadn’t much encouraging prospects (前景): women had a life expectancy of 72.4, and men of 64.8 years old, if they were more leisurely in their movements. According to the paper, published last week, that ratio held true even if the fast walkers were severely overweight. It does not necessarily mean fast walkers will live longer. Experts say it suggests walking speed could be a simple way for doctors to judge their patients’ general health alongside other tests.

It is hardly the first study holding up walking speed as a powerful evidence that appears to improve and determine our health.

In 2011, the Journal of the American Medical Association (JAMA) published a study by Stephanie Studenski, who found the same: walking speed was a reliable predictor of life expectancy.

In 2013, US researchers found walking pace was linked to lower heart disease risk and longer life expectancy. In 2018, a study from the University of Sydney found picking up your walking pace to even an “average speed” could cut your risk of premature death by a fifth.

And Tom Yates, the physical activity professor at Leicester who's behind the latest study, has been publishing findings on this connection for years.

In 2017, he analyzed the same UK Biobank data and found walking speed appeared to affect the risk of dying from heart disease — concluding that the slowest walkers were twice as likely to suffer a heart-related death compared to quick walkers.

1. What does the underlined word “briskly” in paragraph 2 probably mean?

A．Casually.

B．Quickly.

C．Actively.

D．Energetically.

2. What does the paper published last week show?

A．Most fast walkers are overweight.

B．Fast walkers have a simple way of living.

C．Walking speed can help doctors know about their patients’ general health.

D．Doctors will surely have better ways to cure their patients of their illness.

3. What did US researchers find?

A．Walking slowly is bad for people's health.

B．Walking speed can predict a person’s life expectancy.

C．People won't die early by increasing their walking pace.

D．Lower heart disease risk is determined partly by walking pace.

4. What’s the best title for the text?

A．Fast Walkers May Have a Long Life Expectancy

B．Life Expectancy Is Determined by Exercise

C．Researchers Try to Improve Life Expectancy

D．The Public Doubt Researches on Walking Speed

7 . Only very rarely ________ attack larger mammals.

A．will it be

B．it will

C．will it

D．it will be

8 . It was the trip to Tibet three years ago________completely changed his attitude towards life.

A．that

B．when

C．who

D．how

9 . The president of the company has promised to increase the salary________the demands of most workers.

A．in memory of

B．in response to

C．in addition to

D．in place of

10 . 多亏了那个人的及时到来，那个溺水的男孩得救了。
Thanks to _________ _________ _________ _________, the drowning boy was saved.