【题目】 If humans ever settle on Mars, they will need water. There is just one problem---there seems to be only huge sheets of ice. Luckily, we know how to drill(钻孔) ice for water. Such methods are already used in Antarctica, and researchers now think they could get them to work on the Red Planet, too. The atmosphere of Mars is too dry to make extracting water vapour from it possible. So ice seems the best bet. But the obvious ice sheets are in the unlivable polar ice caps and would be difficult to reach for drilling.

However, in 2018, at the edge of the cliffs, NASA's Mars Reconnaissance Orbiter spotted relatively accessible water ice that is probably at least 130metres thick and covered in just a few metres of rock and dust. These may be the best place to get the water needed for future exploration of the planet.

The drilling techniques needed have already been developed for cold areas on Earth where we need to melt buried ice for water. In the early 1960s the US Army used a type of subsurface reservoir(水库)called Rod Well, in army camps in Greenland. The method works by drilling through the ground into the ice, melting the ice to create a pool, and then pumping water up. By supplying heat continuously, they create a reservoir and a steady water supply. It has been used in remote areas such as the Amundsen-Scott South Pole Station Stephen Hoffman at the Aerospace Corporation in Texas and his colleagues simulated(模拟)how a Rod Well would do on Mars. They found that with the power of 9 kilowatts (千瓦)to melt ice, it could in theory produce about 380 litres of water each day and maintain a reservoir of constant size at the bottom of a borehole(钻孔). That is close to the average daily water use each person in the US, but about 10 times what each astronaut on the International Space Station uses daily.

1Which of the following can replace the underlined word "extracting" in the first paragraph ?

A.obtainingB.protecting

C.PreventingD.choosing

2Why does the author mention the Rod Well in Paragraph 3?

A.To explain how water ice is drilled on Mars.

B.To tell about the history of water ice drilling techniques.

C.To prove the importance of water ice drilling techniques

D.To show techniques for drilling water wells in Martian ice exist.

3On average, how much water does an astronaut on the International Space Station use daily?

A.10 litresB.38 litres

C.160 litresD.380 litres

4What would be the best title for the text?

A.Preparing to settle on the Red Planet one day.

B.Finding water on the Red Planet for survival.

C.Using some ways to create a livable environment on Mars.

D.Drilling water wells in Martian ice to survive on Mars.

【题目】 Have you been working from home at your dining room table, on your couch or even from bed? We find ourselves typing away on our laptops and tablets in different positions around the house. 1, I've created a quick stretch and core routine that combines both yoga and Pilates exercises. These simple moves will not only help straighten you out, they'll also reduce strain and tension in your shoulder muscles, neck, and legs.

2

While seated or standing, roll your shoulders back and clasp your hands behind you. Pull your arms away from your back as you expand your chest, and breathe deeply. Stick your chest forward as you pull your arms back. Hold this for 3 deep breaths, in and out.

Neck stretch

3 . Lift the right arm up and press your right hand onto the left side of your head for a more intense stretch. Hold this for 3 deep breaths, and then repeat on the other side.

Single leg hamstring stretch

Stand up and place your right heel onto the chair or couch. Bend the foot, and lean forward to stretch the hamstring and calf (小腿肚).4. Hold this position for 3 breaths, and then repeat on the other side.

5 , because we're combining Pilates core work with yoga stretching and strengthening. Repeat it every hour if possible.

A.Shoulder stretch

B.Strike your hands behind you

C.This routine counts as a mini workout, too

D.To shift to the edge of your couch, bed or chair

E.To help you maintain good pose no matter where you're working

F.Make sure your legs are square to the chair and your feet are leg length apart

G.Drop your right ear toward your right shoulder to stretch the left side of your neck

【题目】 In the United Statesthe baby boomer generation(婴儿潮一代) include those who were born in the time after World War II. Those babies have retired or are now reaching the retirement age. As these adults age, many of their adult children worry about how to take care of their aging parents. In the United States it is not common for several generations to live under one roof. Once children grow up and get married, they move out, leaving their aging parents to care for themselves. When these aging parents can no longer take care of themselves because of age or illness, it is not uncommon for adult children in the US to place their elderly parents in a nursing home.

A nursing home is a place that offers care for the elderly and ill. As the name suggestsnursing homes have professionals including nurses, doctors and social workers to help aging adults deal with the challenges of daily life. And their mental health could be guaranteed for elderly people to get relaxed, accompanied by those of the same age. Most nursing homes also have social activities for the elderly to participate in and keep active. These activities range from games to dance classes, and movie nights. Nursing homes are supposed to provide three nutritious meals for their residents.

Nursing homes are controversial, however. There have been cases across the country of staff in nursing homes treating the elderly residents badly and even robbing them. There are different states and federal agencies that are supposed to oversee(监管) nursing homes. Some people feel that it should be the responsibility of family members, especially adult children, to care for their aging or sick parents. However, many adult children have their own children and families to take care of, and do not have the means to care for their elderly parents; others worry about medical skills needed if their elderly parents are seriously ill. And these problems of caring for parents are bothering more and more adults in the US at present.

1The first paragraph mainly about___________.

A.when the baby boomer generation in the US were born

B.whether the elderly and their children should live together

C.why Americans put their elderly parents in nursing homes

D.how Americans look after their aging parents differently

2How many advantages of nursing homes are mentioned?

A.Three.B.Four.

C.Five.D.Six.

3What’s the writer’s attitude toward sending parents to nursing homes?

A.Indifferent.B.Understandable.

C.Favorable.D.Disapproving.

4What’s the purpose of the text?

A.To discuss how to care for aging parents.

B.To ask the government to oversee nursing homes.

C.To prove nursing homes do more harm than good.

D.To show problems faced by American adult children.

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