Sometimes, you might not finish drinking your...

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Sometimes, you might not finish drinking your glass of water before you go to bed. You might want to drink it the next morning. But have you ever wondered if it is still safe to drink?

“If you have clean water in a clean glass, you’re fine to drink it for a day or two,” Kellogg Schwab from the Johns Hopkins University Water Institute in the US told Time.

But you may find that it tastes strange. That’s because after about 12 hours, the carbon dioxide in the air reacts with the water in your glass, slightly lowering its pH level.

Also, there might be more microorganisms in your water if you leave it out overnight. Microorganisms grow more quickly at room temperature. These microorganisms can stick to your glass. They can make you get sick more easily. But as long as you clean your glasses very often, this will not be a problem.

In countries like the US and UK, people often drink water directly from the tap . This is OK – however, tap water cannot be stored for a long time. Most experts say that tap water has a shelf life of six months, according to Zane Satterfield from West Virginia University, US. After six months, there is less chlorine in the water and bacteria start to grow. You’d better not drink the water otherwise you may get sick.

What about plastic water bottles? Schwab said people should be careful with them. If you leave a bottle of water under the sun or in a car for a long period of time, the plastic produces a chemical called BPA. This chemical can cause heart disease and cancer.

1.According to the passage,the water in the glass tastes strange after about_______.

A. 12 hours B. 2 hours

C. a day and a night D. two days

2.Why does the water taste strange after a night?

A. Because there is less chlorine in the water.

B. Because the glasses are dirty after a night.

C. Because the plastic produces a chemical called BPA

D. Because the carbon dioxide in the air reacts with the water , lowering its pH level.

3.The underlined word “ microorganisms” in the fourth paragraph probable mean　 “________”

A. 漂浮物 B. 微生物 C. 抗生素 D. 废弃物

4.Which of the following is not true?

A. You may get sick more easily after you drink the water overnight.

B. It’s not a right way to leave a bottle of water under the sun for a long time.

C. Many people drink water directly from the tap because of no bacteria in the running water.

D. Kellogg Schwab advised us to drink clean water in a clean glass for a day or two.

九年级英语阅读单选中等难度题

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Sometimes, you might not finish drinking your glass of water before you go to bed. You might want to drink it the next morning. But have you ever wondered if it is still safe to drink?
“If you have clean water in a clean glass, you’re fine to drink it for a day or two,” Kellogg Schwab from the Johns Hopkins University Water Institute in the US told Time.
But you may find that it tastes strange. That’s because after about 12 hours, the carbon dioxide in the air reacts with the water in your glass, slightly lowering its pH level.
Also, there might be more microorganisms in your water if you leave it out overnight. Microorganisms grow more quickly at room temperature. These microorganisms can stick to your glass. They can make you get sick more easily. But as long as you clean your glasses very often, this will not be a problem.
In countries like the US and UK, people often drink water directly from the tap . This is OK – however, tap water cannot be stored for a long time. Most experts say that tap water has a shelf life of six months, according to Zane Satterfield from West Virginia University, US. After six months, there is less chlorine in the water and bacteria start to grow. You’d better not drink the water otherwise you may get sick.
What about plastic water bottles? Schwab said people should be careful with them. If you leave a bottle of water under the sun or in a car for a long period of time, the plastic produces a chemical called BPA. This chemical can cause heart disease and cancer.
1.According to the passage,the water in the glass tastes strange after about_______.
A. 12 hours B. 2 hours
C. a day and a night D. two days
2.Why does the water taste strange after a night?
A. Because there is less chlorine in the water.
B. Because the glasses are dirty after a night.
C. Because the plastic produces a chemical called BPA
D. Because the carbon dioxide in the air reacts with the water , lowering its pH level.
3.The underlined word “ microorganisms” in the fourth paragraph probable mean　 “________”
A. 漂浮物 B. 微生物 C. 抗生素 D. 废弃物
4.Which of the following is not true?
A. You may get sick more easily after you drink the water overnight.
B. It’s not a right way to leave a bottle of water under the sun for a long time.
C. Many people drink water directly from the tap because of no bacteria in the running water.
D. Kellogg Schwab advised us to drink clean water in a clean glass for a day or two.

九年级英语阅读单选中等难度题查看答案及解析
—What would you like to drink, girls?
—________， please.
A. Two glass of water　　 B. Two glass of waters
C. Two cups of tea　　 D. Two cups of teas

九年级英语单项填空中等难度题查看答案及解析
——What would you like to drink, girls?
——________，please.
A．Two glass of water B．Two glass of waters
C．Two cups of tea D．Two cups of teas

九年级英语单项填空中等难度题查看答案及解析
There is _______ water in the glass, but it’s _______ cold. You’d better not drink it.
A. a bit; a bit　　 B. a bit of; a bit
C. a little; a little of　　 D. a little of; a little

九年级英语单选题中等难度题查看答案及解析
— Which would you like, a cup of coffee or tea?
— Neither, thanks. I ________ drink a glass of water.
A. prefer　　　 B. like　　　 C. would like　　 D. would rather

九年级英语单项填空中等难度题查看答案及解析
— Which would you like, a cup of coffee or tea?
— Neither, thanks. I ________ drink a glass of water.
A. prefer　　　 B. like　　　 C. would like　　 D. would rather

九年级英语单项填空中等难度题查看答案及解析
—Which would you like to drink, tea or coffee?
—________. I just want a glass of water.
A.Both B.Either C.Neither

九年级英语单选题中等难度题查看答案及解析
动词填空
根据括号中所给动词的正确时态、语态或不定式形式填空。
1.Did you make him _____ (drink) a glass of water?
2.It’s hot. You’d better________(not put) on your coat.
3. Can the work ________ (finish ) soon?
4.We ________ (plant ) many trees last year .
5.They ________ (plan) a trip to Disneyland at this time yesterday .
6.There ________(be) a football match between the two countries on TV next week.
7.________ you ________(have) English classes every day ?
8. I ________ (teach) here since I finished school.
9. He said that he ________ (buy) a new bike for me the next Friday.
10. By the time he got there, the bus ________ already ________(leave).

九年级英语单词拼写中等难度题查看答案及解析

If wearing Google Glass- a pair of smart glasses—on your face isn’t cool enough, you might want to take a look at Nokia’s new skirt. It’s made of 80 mobile phones! It’s believed to be the world’s first smart skirt and has been shown at London Fashion (时装)Week. The smart skirt was created by the mobile phone company Nokia, fashion designer(设计师) Fyodor Golan and creative design house Kin.

It’s not easy to make a smart skirt. It took three months to complete it. The biggest challenge in making the skirt was getting all of the mobile phones on the skirt, and allowing all the mobile phones to work together. The screens are all connected to a computer. As the skirt moves, the screens change color and the skirt looks like silk. That’s not the only trick. The mobile phones are also connected to a hidden camera in the wearer’s hat. The screens can show what the wearer is seeing.

Unsurprisingly, the skirt won’t be making its way to shops. Instead, it’s more of an art piece. Nokia said they wanted to find a way to connect the smart technology and fashion together. “We used drawings, 3D printing, and programming languages to ‘build’the skirt, ” explained Nokia.

How many mobile phones are used in the smart skirt?	①　　 are used.
How long did it take to make this smart skirt?	It took 　　 ②　　 .
How about getting all of the mobile phones on the skirt, and allowing them together?	It is 　　 ③　　 in making the skirt.
Why did Nokia make this smart skirt?	They wanted to find a way to connect the smart 　　 ④　　 together.
What did they use to ‘build’the smart skirt?	Drawings, 3D printing, and 　　 ⑤　　　 .

1.①________

2.②________

3.③________

4.④________

5.⑤________

九年级英语填空简单题查看答案及解析

—-Would you like to drink a glass of apple juice?
— _________. I am not thirsty.
A．Yes, I’d like to. B．Yes, please.
C．No, thanks. D．No, I wouldn’t.

九年级英语单项填空中等难度题查看答案及解析