Some days, don't you think, "Wouldn't it be nice if the laundry would just do itself?" Self-cleaning clothes may sound crazy. But Australian researchers have found a way to make something like this _______!

A team at RMIT University in Melbourne, Australia, found a way to put special nanostructures (纳米结构) into clothing, which can then clean the clothes. When sunlight hits the nanostructures, they break down dirt. The nanostructures don't break down the actual clothing because cotton and the other clothing materials are too strong to be _______.

According to CNN, the researchers covered the clothing in a solution made of silver and copper (铜) nanostructures. _______ it takes is 40 minutes of sunlight and your clothes will look as good as new.

So if you spill on yourself during lunch, you can step outside for a walk, and it will be clean _______ the time you go inside. It not only makes your life easier, but can also be good for the climate.

According to the US Department of Energy, the average load of laundry uses about 25 gallons (about 94 liters) of water. Water is a very important resource, so using _______ of it to wash clothes is better for the environment. So one of the scientists at RMIT University knows more needs to be done.

"There's more work to do before we can start _______ our washing machines," said DiRajesh Ramanathan, "but this is a strong foundation (基础)."

So what's the next step? Ramanathan wants to either start selling the solution by itself or convincing clothing makers to treat their clothing with the solution.

1.A.true B.possible C.close D.special

2.A.destroyed B.divided C.broken D.damaged

3.A.All B.Everything C.Something D.This

4.A.for B.as C.by D.with

5.A.more B.most C.fewer D.less

6.A.putting down B.working on C.throwing away D.dealing with

Masks, a simple protective tool, have been used by people for a long time. They can not only prevent epidemics, but also protect us from other harmful things, such as smog (雾霾) and chemicals. When was the protective mask first invented and how did it develop? Let's take a look.

1.Masks have been used as __________ by people for a long time.

A.a modern fashion B.a kind of cloth C.a pretty decoration D.a protective tool

2.The first recorded use of protective masks was made of __________.

A.gauze B.animal bladder C.cloth D.chemicals

3.__________ advised people to wear a woven (纺织的) cloth dipped in water over their faces to protect against harmful chemicals.

A.American Lewis Hassley

B.Polish-Austrian doctor Johann von Mikulicz Radecki

C.Italian artist and inventor Leonardo da Vinci

D.Chinese doctor Wu Liande

4.In 19th century, what the inventors did for the mask was to___________.

A.make its models such as N95 and KN95 B.patent (注册专利) them for doctors

C.design them with one layer of gauze D.filter out (过滤掉) fine particulate matter

5.The advantage of 'Wu's mask' is that __________.

A.it was used to prevent epidemics B.it was invented to prevent infection.

C.it was praised by experts around the world D.it could be produced easily and cheaply

6.The best title of the passage can be __________.

A.Protecting miners from dust B.Wearing masks to prevent infection

C.Producing masks throughout time D.Improving masks throughout time

in the middle, is, a lake, with, also, a pavilion, there, (连词成句)

____________________.

Our government provides free medical care for NCP patients.  (改成被动语态)

Free medical care _______ _______ for NCP patients.

We haven't decided where we will hold the meeting. (改为简单句) 

We haven't decided ________ _________ hold the meeting.

Be strict with yourself or you will fall behind. (保持句意基本不变)

You will fall behind ________ you _______ strict with yourself.

The man in black is the doctor who has become famous recently.  (对划线部分提问)

_______ ________ is the doctor who has become famous recently?

We can protect ourselves by washing our hands more often. (对划线部分提问)

_______ _______we protect ourselves?

All people in our town warmly welcomed the medical workers back from Wuhan. (改为一般疑问句)

_______ all people in our town warmly _______ the medical workers back from Wuhan?

— I'd like to see Professor Li, please. ________?

—You've just missed him.

A.Is he available B.What's wrong with him C.Does he agree D.What's he doing