How the big forest fire has ________ remains ...

How the big forest fire has ________ remains to be a mystery.

A．turned up         B．broken out        C．taken place        D．broken up

高一英语单项填空简单题查看答案及解析

How the big forest fire has ________ remains to be a mystery.

A. broken out         B. broken up      C. taken place    D. turned up

高一英语单项填空简单题查看答案及解析

How the big forest fire has ________ remains to be a mystery.

高一英语单项填空简单题查看答案及解析

How the fire in the dancing hall started _________ a mystery.

A．to remain                             B．remains

C．is remaining                           D．is remained

高一英语单项填空中等难度题查看答案及解析

There was a big forest fire last week, but nobody knows how it ________.

A．took place         B．turned up         C．broke out         D．broke up

高一英语单项填空简单题查看答案及解析

How the Grand Canyon (大峡谷) was created remains one of the geology’s greatest mysteries. Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years. But volcanic rock samples taken from the canyon now suggest that the canyon was down-cut instead.

Down-cutting is when a flood of water rushes over a landscape (地形) with enough force to cut deeply into the ground and leaves behind a canyon. Such a flood is usually released when a natural or man-made dam (堤坝) bursts.

Robert Webb, a research geologist, says natural dams seem to have formed and broken across the Colorado River several times during the last million years. The dams were built when lava(熔岩) from the eruptions of nearby volcanoes flowed into the river. The lava hardened into hard rocks and blocked the river, causing it to back up and form a lake. Each time the lake grew so huge that it broke the rock dam, releasing a flash flood that furthered the down-cutting process and deepened the canyon.

Down-cutting is not just an earthly event. Satellite photos sent back from Mars suggest that the process has happened there, too, say many other researchers.

The photos, taken by the Mars Global Surveyor, indicate that an enormous lake existed on Mars 3.5 billion years ago. The lake spilled into a large nearby hole. One edge of the hole broke, releasing a flash flood that quickly carved out a grand canyon.

The existence of down-cutting on Mars is just one more piece of evidence that the cold, dry planet was once warm and wet.

1.In the past, deep canyons were believed to have formed _______.

A. as a result of a sudden break of volcanoes

B. due to river flows over millions of years

C. owing to the burst of artificial dams

D. thanks to our ancestors’ creative work

2.According to the passage, which of the following statements is TURE?

A. Several volcanoes broke out on Mars directly creating grand canyons.

B. Several great lakes existed on the upper parts of the Colorado River.

C. People built high dams on the upper parts of the Colorado River.

D. The Colorado River crossed the Grand Canyon to form down-cutting.

3.From the last three paragraphs we learn that _______.

A. there are great lakes on Mars

B. there are active volcanoes on Mars

C. there might be cities on Mars

D. there might be life on Mars

4.The passage can be titled as _______.

A. Lakes on Earth and Mars

B. The Cause of Lake Formation

C. The Force of Dam Breaking

D. Canyons—Results of Flood Cutting

高一英语阅读理解中等难度题查看答案及解析

—How did you mange to escape from the big fire last Wednesday?

—The couple _______ next door woke me up and we called the firefighters.

高一英语单项填空中等难度题查看答案及解析

The big fire was______ danger to the building, which was in ______ danger of being burned down.

A．the, the           B．a, the             C．a, \              D．the, \

高一英语单项填空简单题查看答案及解析

The Woolly Monkey Mysteries: The Questio Save a Rain Forest Species

By Sandra Markle. Ages 8 to 10.

Woolly Monkeys spend most of their time high up in 150-foot-tall trees. That makes them difficult animals to count and to study. But cameras have provided valuable information and taken, as this book shows, amazing pictures. Experts now believe that Peru’s lowland monkeys and the waste they produce are necessary to the survival of the rain forest.

Camp Panda: Helping Cubs Return to the Wild

By Catherine Thimmesh. Ages 10 to 12.

The giant panda is much-beloved in China, but in the past 40 years, at least half of its places has been destroyed. Camp Panda tells about efforts to reintroduce the giant pandas into the wild so that they might have a future. As part of the efforts, people wear panda costumes (服装) that smell like pandas while weighing and measuring the young pandas. They aren’t supposed to get used to seeing and being around people, because people could bring a threat to them in the wild.

Beyond Words: What Elephants and Whales Think and Feel

By Carl Safina. Ages 10 and older.

Carl Safina studied elephants in an African national park and killer whales off the coast of Washington state. He learned about their strong family bonds, the surprising ways they communicate and how they play and hang out with one another. This book makes a strong case for protecting the ability of these animals to live freely.

Back from the Brink: Saving Animals from Extinction

By Nancy F Castaldo. Ages 10 and older.

This book focuses on seven groups of animals—including whooping cranes, California condors and American alligators—that were brought back to healthy numbers by a lot of efforts. As she celebrates these successes, Nancy F. Castaldo also makes clear that dangers, such as the effects of climate change, still cloud the future of these creatures.

1.Which is the most suitable book for readers below 10?

A.The Woolly Monkey Mysteries: The Questio Save a Rain Forest Species.

B.Beyond Words: What Elephants and Whales Think and Feel.

C.Back from the Brink: Saving Animals from Extinction.

D.Camp Panda: Helping Cubs Return to the Wild.

2.Why do people wear panda costumes?

A.To attract visitors.

B.To make pandas feel safe.

C.To take photos of pandas in the wild.

D.To celebrate the increasing number of pandas.

3.What do these four books focus on?

A.Animal rights. B.Climate change.

C.Animal protection. D.Rain forests.

4.What’s the purpose of the author to write the text?

A.To introduce four books. B.To get to know some writers.

C.To describe some rare animals. D.To educate children to love animals.

高一英语阅读理解简单题查看答案及解析

Special attention should be paid to ________ forests from fires in winter.

A．protected         B．protecting         C．protects          D．protect

高一英语单项填空中等难度题查看答案及解析