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 . When I was a practice teacher in a middle school，the students in my class were always making ______，and had no interest in chemistry. So I decided to do ______to change their______ towards chemistry.

The evening before I would teach all by myself，I gave a piece of paper to everyone. I told them to write ______ they wanted on the paper and handed it in and then I could tell what each one had ______ .All the students said I _____ be longsighted(远视)．Then I stood ______ my back towards them. I didn't turn back ______ they had finished and ______ all the paper in a cardboard case.

I turned the cardboard case with the bottom(底部)towards the students，and told them calmly what each one had written on the paper. The students were surprised，______ that I had learned their ______ completely in such a short time.

I told them the truth and they were ______ at my brightness：there were five lines of students in the classroom，and every line had ten students. I had written serial number(from 1 to 50 )on every ______ of the paper in a chemical reagent(试剂)that cannot be seen ______eyes，and then gave ______out to the students according to the groups of their seats. After the paper was ______ in，I used______ chemical reagent onto the corner of the paper. Thus the serial number was ______！

______ ，the students became ______ interested in chemistry，and we became good friends.

1.

A．progress

B．troubles

C．faces

D．efforts

2.

A．something

B．nothing

C．all

D．them

3.

A．methods

B．attitudes

C．feelings

D．interest

4.

A．that

B．how

C．when

D．what

5.

A．thought

B．seen

C．written

D．heard

6.

A．would

B．needed

C．had to

D．might

7.

A．with

B．for

C．to

D．as

8.

A．after

B．when

C．until

D．now that

9.

A．put

B．left

C．had

D．gave

10.

A．knowing

B．believing

C．seeing

D．hearing

11.

A．names

B．faces

C．characters

D．handwritings

12.

A．frightened

B．angry

C．sad

D．amazed

13.

A．corner

B．bottom

C．top

D．side

14.

A．in

B．for

C．with

D．to

15.

A．it

B．that

C．them

D．those

16.

A．given

B．handed

C．passed

D．offered

17.

A．expensive

B．useful

C．another

D．smelly

18.

A．made

B．seen

C．found

D．looked

19.

A．From then on

B．However

C．Though

D．So far

20.

A．a lot of

B．a lot

C．partly

D．greatly

3 . 阅读下面短文,并根据短文内容完成下列各题。

When I was a kid, my parents were busy working so they enrolled (登记) me in the Spartak Tennis Club in Moscow. Every day after school my parents would take me to Spartak and I would be there until maybe nine o'clock. All we did was play tennis, eat, do homework, have fun and hang out. It was basically my second family.

In that second family was a woman who was like a mother to me, my first coach, Larissa. I still refer to her as my second mother. She taught me everything I know about how to play tennis, but she’s also a wonderful person. She’s kind and patient, which is not what you expect from one of the top tennis coaches in Russia.

Her program when I was little was based on tricking us into doing our exercises. She would put a candy under the cones (锥形物), and we would try to hit the targets with balls, you got to have an ice cream.

Of course we worked hard and I didn’t let her down.

My second-ever tournament was the Moscow Championships, and I won. Afterwards Larissa came up to me and said, “Congratulations, Enjoy today because tomorrow it’s back to work.” She was always telling us to celebrate and have fun with any particular achievement but to always remember there is something more you can do, something more you can achieve.

Now every time I go back to Russia I go to Spartak to see Larissa. We look at all the pictures from all the birthday parties and tournament and celebrations. It is really cool to have someone like her in my life. Larissa is still coaching, but we don’t talk much about tennis any more. We just talk.

1. Why did the author go to Spartak every day? (no more than 15 words)
2. What does the author think of his coach? (no more than 10 words)
3. What’s Paragraph 3 mainly about? (no more than 10 words)
4. What does the underlined phrase “let her down” in Paragraph 4 mean? (no more than 5 words)
5. What can you learn from Larissa? (no more than 25 words)

4 . 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

5 . 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

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 . He has ________ confidence in his father.

A．academic

B．abstract

C．appropriate

D．absolute

8 . They were ________ of selling $10,000 worth of heroin (海洛因) to the drug users.

A．accused

B．accustomed

C．adjusted

D．accompanied

9 . 阅读下面短文，在空白处填入1个适当单词或括号内单词的正确形式。

Good afternoon, students. We have finally made some     1    (change) to the school clothing rules. The main differences are about hair and shoes. First, I'll talk about the problem with shoes. Recently, I     2    (notice) that some of you have been wearing very expensive designer shoes to class. This has some bad influence     3     our students. We want the school to be an exciting     4     serious place to learn. So, we are keeping out all shoes     5     cost more than $100. The second issue is hairstyles. While we understand that you want to express     6     (you), we have to say no to     7     (color) hair. A little red or blue or even     8     (make) your hair blond is OK. But bright pink hair or crazy hair that has five different colors? That' s too much for the classroom. You can wait to experiment with your hair during summer vacation. During the school year, we want you     9     (keep) your minds on your work so you can do well on your tests. The exams will be     10    (hard) this year, so we have a lot more work to do!

10 . With no end in sight to the coronavirus pandemic(新冠疫情), it looks like protective face wear is here to stay.

But who says it can’t be stylish?

Throughout the pandemic, designers have been bringing out their face masks— luxury(奢华) versions include Off-White’s popular $95 Arrow logo face mask and Burberry’s vintage check cotton design, selling for £90 ($115).

And now, Louis Vuitton is taking it a step further, making a luxury face shield(护罩) that’s designed to be “both stylish and protective”, the French fashion house said.

The “eye-catching” LV Shield changes from clear to dark in sunlight, protecting wearers from the sun. It also has golden studs with Louis Vuitton’s logo and an elastic headband(松紧带). The visor(面盔) can also be worn upward as a classic cap.

The shield has not yet been priced, but as a high-end fashion brand, it may not be cheap. Other Louis Vuitton head wear, including hats and sunglasses, sell for hundreds of dollars.

The face shield will be sold online and at select Louis Vuitton stores starting on October 30th.

In April, Louis Vuitton joined the global effort to make personal protective equipment to support health care workers on the front lines of the pandemic. The company said it had repurposed several of its workshops across France to “produce hundreds of thousands of non-medical face masks” for health care workers.

The company also said it was giving away thousands of hospital clothing to six Paris hospitals in need of protective suits.

The Centers for Disease Control and Prevention does not recommend using face shields as masks, because it is not clear what level of protection they provide.

1. What is the idea of Louis Vuitton designing the luxury face shield?

A．To reduce pressure on faces.

B．To cut the cost of face masks.

C．To make the wearers feel protected and fashionable.

D．To bring out a classic face mask

2. Which of the following is true of the LV face shield according to the text?

A．It changes from dark to clear at night.

B．It has golden studs with Arrow logo.

C．It has an elastic headband.

D．The visor can be worn downward.

3. What do we know about the face shield from the passage?

A．It is attractive.	B．It’s cheap.
C．It is unfashionable.	D．It’s perfect.

4. What’s the attitude of the Centers for Disease Control and Prevention towards the LV face shield?

A．Uncaring.

B．Doubtful.

C．Thankful.

D．Supportive.