It’s an important event in history. Who knows _________?

A. when does it happen B. when it happens

C. when did it happen D. when it happened

練習冊系列答案
相關習題

科目：初中英語 來源：人教新目標版七年級下冊 Unit 5單元過關檢測試卷 題型：單選題

The koala sleeps______ the day, but _____ night he gets up and eats leaves.

A. at; at B. in; in

C. during; at D. at; during

查看答案和解析>>

科目：初中英語 來源：北京市東城區(qū)2019屆九年級上學期期末教學統(tǒng)一檢測英語試卷 題型：材料作文

培養(yǎng)獨立自主的生活能力對中學生非常重要。獨立自主的生活能力包括自主安排時間、自覺完成作業(yè)、自己整理房間、做飯等。

某英文網(wǎng)站正在開展以“培養(yǎng)獨立自主的生活能力”為主題的征文活動。假如你是李華，請用英語寫一篇短文投稿，談談你在生活中能獨立自主做哪些事情，還需要在哪些方面改進。

提示詞語：manage time, waste, tidy up，learn

提示問題：．What can you do independently in your daily life?

．What do you need to improve?

查看答案和解析>>

科目：初中英語 來源：北京市東城區(qū)2019屆九年級上學期期末教學統(tǒng)一檢測英語試卷 題型：單選題

I must find my math book, ______ I’ll have to buy a new copy.

A. and B. or C. but D. so

查看答案和解析>>

科目：初中英語 來源：北京市九年級期末考試英語試卷 題型：閱讀單選

Homeless people face a lot of challenges, such as not having enough to eat and no job opportunities. Some of the most basic challenges, however, are not having clean water and toiletries (衛(wèi)生用品) — a big problem for homeless teens. That encouraged a young researcher to invent a multi-purpose product to help these teens.

"I was born into a life of volunteering," said 13-year-old Leia Gluckman. And that’s true. Her mom is a president of an organization providing help for homeless teens. Leia and her brother have volunteered there for years. When she was a young girl, Leia helped serve food where teens were eating. Now she’s a teenager herself, and she’s managing the toiletry and clothing work there.

From her work at the center, Leia noticed that teens asked for some toiletries more than others. What they needed most often were toothpaste, body powder (粉) and shampoo (洗發(fā)水). Leia wondered whether she could create a product to serve all three purposes.

It would need to take away dirt and oil from skin and hair. It would need to clean teeth. Also, it would need to kill bacteria (病菌) without being harmful to people. She wanted her ingredients (產(chǎn)品成分) to be natural, to be able to break down easily and to taste and smell pleasant. Moreover, this product had to be low-cost and have a long shelf life.

Leia started by going to stores and looking at the ingredient lists for toiletries. Then she tried eight different ways. She tested each way to see how well it worked.

Not all of them worked well. But she finally decided on three. Each includes salt and baking powder. Salt helps clean teeth and skin; baking powder helps take in bad smells. She also has some other recipes which include some special materials that give her products different tastes and smells, which would let teens choose a product based on personal preferences.

It wasn’t easy, but Leia came up with some model products. She presented them at the finals of Broadcom MASTERS science competition.

Leia wants to develop her products further. "Could it possibly be used to drive away mosquitoes (蚊子)?" she wonders.

"Science offers a way to go about solving problems and helping people," says Leia. And she thinks her products could benefit a great number of people, not just the homeless. Anyone in an area with little or no chance to get clean water could find her products useful, maybe refugees (難民) and soldiers who are sent to places without running water.

1.What is the main idea of Paragraph 2?

A. Leia has lived a life of volunteering for years.

B. Leia and her brother helped their mom for years.

C. Leia was born in a great family of volunteering.

D. Leia’s mom set up an organization for homeless teens.

2.Leia’s products meet homeless people’s needs mostly because ___________.

A. they are cheap and natural

B. they can offer personal choices

C. they are used to drive away mosquitoes

D. they can serve three purposes with little water

3.According to the passage, we know that ___________.

A. Leia invented the product in order to win the MASTERS competition

B. Leia’s invention came from her will to create and to help others

C. The family influence played a decisive role in Leia’s invention

D. Leia believed that science could help solve problems easily

查看答案和解析>>

科目：初中英語 來源：北京市九年級期末考試英語試卷 題型：單選題

My grandma has three dogs. She ________ them every morning.

A. is walking B. has walked

C. walks D. walked

查看答案和解析>>

科目：初中英語 來源：天津市和平區(qū)2019屆九年級上學期期末考試英語試卷 題型：單詞填空

Most great inventors often met with much trouble in their work. Before they could succeed, they had to overcome (客服) thousands of difficulties. The following is one of such e1..

George Stephenson (1781～1848), a famous British inventor made the first train in 1825, using a stream engine. When he was experimenting with the engine on the train, he met with troubles from the government, the newspapers and the gentlemen in the country. They said that the n2.and the smoke would kill cows, horses and sheep, that the engine would burst (爆裂) or that the h3. coals from it would set fire to their houses.

George Stephenson told the people that the train could go on small rails, could pull carriages full of goods (貨品) and p4.and that there was no great d5. to them. It was a very difficult matter for him to convince (使信服) them. H6., after some time, the first train that was d7. by Stephenson himself proved him right. On the train there was a new steam engine. It was invented by him, and was proved a complete success.

The first day when the train ran on the rails, people along the way heard the noise of the train in the distance, and saw it r8. quickly to them. They thought it was a genie (妖怪). They were so full of fright that they ran quickly back home and closed their doors tightly. They did not dare to come out until it had passed. An old woman s9.said that her hen had been so frightened that it hadn’t l10. any eggs for three days.

查看答案和解析>>

科目：初中英語 來源：天津市和平區(qū)2019屆九年級上學期期末考試英語試卷 題型：單選題

It’s no use ________ Bob advice. He won’t listen to you.

A. give B. to give C. giving D. gave

查看答案和解析>>

科目：初中英語 來源：廣東省博羅縣2017年秋季學期期末教學質量檢查七年級英語試卷 題型：單選題

My mother didn’t feel well this morning. She had a little_______for breakfast.

A. tomatoes B. noodles C. rice D. potato

查看答案和解析>>

同步練習冊答案