Don’t worry about your grandmother, All the o...

Don’t worry about your grandmother, All the old people 　　　 in China now.

A. are good taken care of　 B. are well taken are of

C. take good care of　　　　 D. take well care of.

九年级英语单项填空中等难度题查看答案及解析

—I'm sorry that I broke your vase.

— ________. Don't worry about it.

A.That's right B.Not at all C.Never mind D.Of course not

九年级英语单选题简单题查看答案及解析

Don’t worry about the children. They’re old enough to take good care of t__________ (他们自己).

九年级英语根据中/英文提示填空中等难度题查看答案及解析

Don’t worry about me too much, mom. I think I’m __________ to finish the work by myself.

A．enough old        B．enough young      C．old enough        D．young enough

九年级英语单项填空中等难度题查看答案及解析

In the days before electricity, people don’t worry much about sleep. They usually went to bed a couple of hours after sunset (日落) and woke at sunrise. After all, there wasn’t much to do in those days after the sun went down. But then came the electric light bulb (电灯泡). And now we have satellite television, the Internet,24-hour convenience stores, and longer hours at work. How much can we sleep? How much should we sleep?

Like it or not, many of us are sleeping less on average (平均). In 1910, most Americans slept 9 hours a night. That dropped to 7.5 hours by 1975. In 2002, a study by the National Sleep Foundation found that the average American got only 6.9 hours. The news is even worse for people who work the night shift. They sleep an average of just 5 hours.

Are we sleeping enough? Not if you believe in the old rule of eight hours of rest, eight hours of work, and eight hours of play. On the other hand, Norman Stanley, a British scientist who studies sleep, believes people’s sleep needs are different. Some people need as many as 11 hours, but others need as few as three. How much do you really need? “To find out,” he says, “simply sleep until you wake naturally, without the help of an alarm clock. That’s your sleep need.”

Meanwhile, other scientists and researchers are searching for new ways to keep us awake longer. Some are developing chemicals (化学药品) that are safer and more powerful than caffeine, the chemical found in coffee and tea. One experimental drug, CX717, kept laboratory monkeys working happily for 36 hours. Further developments may allow people to safely stay awake for several days straight. One group of researchers is studying a gene (基因) found in some fruit flies that lets them get by on one-third the usual amount of sleep. Another group is even working on an electric switch that immediately wakes up a sleeping brain.

The meanings of this research are huge. On the one hand, this could lead to a world where we work longer and longer hours with less and less sleep. On the other hand, if we needed less sleep, we would have more free time to travel, read, volunteer, and spend time with family.

1.How many hours did most Americans sleep a night in 1975?

A. 5.　　 B. 6.9.　　 C. 7.5.　　 D. 9.

2.What can we learn from the passage?

A. People have got enough sleep.　　 B. People will work longer hours.

C. Sleep time will be a big problem.　　 D. Staying awake for long is possible.

3.What is probably the best title of the passage?

A. To sleep or Not to sleep?　　 B. How can We Sleep Longer?

C. To Work or Not to Work?　　 D. How Much We can Sleep?

九年级英语阅读单选困难题查看答案及解析

Don’t worry about your illness. The doctor will 　　　　　　 you.

A.believe B.teach C.treat

九年级英语单选题简单题查看答案及解析

Don’t worry about your illness. The doctors will _____ you.

A. treat B. double C. believe D. change

九年级英语单选题中等难度题查看答案及解析

People in China all wonder when we ______ worry about the air we breathe.

A. can’t　　 B. needn’t　　 C. shouldn’t　　 D. mustn’t

九年级英语单选题中等难度题查看答案及解析

请根据句意从方框中选择合适的动词，并用其适当时态填空，使句子通顺。

1.--Don’t worry about your safety! The police _________ the murder for us.

-How lucky! We should be thankful for their hard work.

2.-- He ______ in hospital for another few days， isn’t he?

--Yes， he needs enough rest.

3. Jane is so kind that she always___________ to anyone with a smile on her face.

4.-- Mary， why does Jack’s mother look so angry?

--Because when she came back， neither Jack nor his sister ________ homework.

5. --Can you tell me how he _____ with the dog?

--He left it in the old house.

九年级英语选词填空中等难度题查看答案及解析

by coach, as long as, worry about, look forward to, at the end of,

go for a walk

1.Don't__________your job. Take things easy.

2.In his letter he said he was__________seeing us soon.

3.We took a tour__________to Hangzhou and had a great time.

4.You can get good grades__________you work hard.

5.--It's a lovely day. Why not________？

--Good idea！

6.We'll have an English exam__________this month.

九年级英语选词填空中等难度题查看答案及解析