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Are there any animals that can return to their youth (青年时期)? There is one in the animal kingdom. It is the animal c1. the immortal jellyfish ( 永 生 水 母 ). Do you know a2. about it?

These small animals are just 4 to 5 millimeters ( 毫 米 ) l3.. Their digestive system ( 消 化 系 统 ) l4. like a light. That’s why they’re also called Turritopsis nutricula ( 灯塔水母 ). Scientists f 5.found them in the Mediterranean Sea in 1883, according to National Geographic. When scientists discovered ( 发 现 ) this, they were very s6. and they didn’t know much about it.

When these sea animals get hurt in d7.situations, they can change their cells(细胞) back to their earliest form—in other words, back to youth. The jellyfish’s cells can change into d8.kinds of cells. Muscle cells can become sperm (精子) or eggs, or nerve cells can change into muscle cells. T9., they grow again. Scientists are still wondering h10.this happens. Isn’t that amazing?

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"If you work hard, your exam score will________ (加倍) , "the teacher said to Jim.

阅读下面短文，根据短文内容完成句子。

World Sleep Day, organized by the World Sleep Day Committee of the World Association of Sleep Medicine since 2008, is on March 21 every year.

World Sleep Day is to celebrate the benefits of good and healthy sleep. Sleep quality(质量) plays an important role in people’s health. Researchers say that there are a lot of advantages if we always get enough sleep. We can be smarter, thinner, healthier and more cheerful. Also we’re to have better skin, better memories and longer lives.

When you lose even one hour of sleep for any reason, it will influence your performance the next day.

In general, adults are thought to need at least eight hours of sleep a night, but a recent survey found that, on workdays, only 21% of them really get a full eight hours of sleep, and another 21% get less than six. For teenagers, a healthy amount is about eight to nine hours every night. However, about 80% of high school students don’t get enough sleep because of their schoolwork or some bad habits.

Twenty-seven percent of people in the world have sleeping problems. Now there are over 80 kinds of sleep disorders, and most people know little about their danger. So, for our good life and work, it’s necessary for us to realize the importance of sleep and try to have a good sleep.

1.World Sleep Day is ________ every year.

2.Maybe it is ________ for our performance if we lose even one hour of sleep.

3.A teenager should sleep ________every night according to the writer.

4.Most high school students don’t get enough sleep because of __________

5.________ have（has）sleeping problems in the world.

—Listen! Is Lily singing in the classroom?

—No. It _____ be Lily. She has gone to Paris.

A.may not B.needn't C.can't D.won't

My sister will come to see me tomorrow. I will meet ________ at the train station.

A.she B.herself C.her D.hers

These are Millie’s trousers. (对划线部分提问)

_____ are these?

When you’re not at home, many worries may start to crowd your mind. Did I turn the coffee maker off? Did I lock the door? Are the kids doing their homework or watching TV? With a smart home, you can forget all of these worries.

A smart home is a home with a communication network. This network connects(连接) devices (装置), such as lights and TV sets, and makes them to be controlled( 控制) from far away through electrical wiring( 电线), mobile phone communication or WiFi over the Internet.

More and more people may start to think about owning a smart home, because it makes life much easier. It can help keep your room at a certain temperature. It can record (录制) what happens inside the home and send the video to your phone. When you are on holiday abroad, you can use a smart home controller to switch on or off the electricity when necessary. Some smart homes can receive a visitor, allowing him to come in and offering him a drink. They can even feed the cat and water the plants.

Besides, smart homes are easy to fix. Most smart home technology and devices are wireless and can be set up with a minimum ( 最 少 量 ) of tools, using only the guiding information. When there is a problem, you can deal with it yourself without paying a professional (专业人士).

However, for home-users, the smart home technology is far from perfect. It can be rather expensive to own the technology and the devices. Also, because the smart home system ( 系 统 ) allows its owner to get home information from anywhere, it leaves the home easy to be attacked by hackers ( 黑 客 ), who may secretly use or change the information in the system.

Now, many scientists are excited about the future of smart home technology. Imagine being able to get fashion advice from your mirror, or receive food shopping suggestions from your fridge. While there are others who worry that those smart devices will make people lazier and lonelier. Whatever it is, one thing is for sure — smart home technology will change the way we live and work.

1.According to the passage, nowadays a smart home can lock the door through .

A.electric lights B.mirror technologies

C.mobile phones D.shopping programs

2.The third paragraph of the passage is mainly about .

A.the steps to use smart systems B.the prices of smart programs

C.the good points of a smart home D.the tools for setting up smart devices

3.Which of the following is TRUE about a smart home according to the passage?

A.Smart homes can’t help feed pets nowadays.

B.Smart homes cost a lot of money at present.

C.You can’t control your smart home in other countries.

D.It’s hard for hackers to get information from smart homes.

4.What’s the writer’s opinion(观点) according to the passage?

A.People will become less happy in the future.

B.People’s life style will be different in the future.

C.Mobile phones are the most important in smart homes.

D.Smart homes are much better than other smart systems.

(2013•盐城市)I think coffee tastes good, but not_______ likes drinking it.

A. somebody B. anybody C. nobody D. everybody

Let’s go hiking, ________ ________ (完成反意疑问句)

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