They will have to close the toy store ______ they can find some more money.

A.if B.unless C.because D.when

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：初中英語 來源：2020年北京市朝陽區(qū)中考一模英語試卷 題型：單選題

As soon as the rain stops, we ________ out to play football.

A.go B.went C.will go D.have gone

查看答案和解析>>

科目：初中英語 來源：重慶市永川區(qū)2019-2020學(xué)年九年級上學(xué)期期末英語試卷 題型：聽短對話回答問題

A.America. B.England. C.Australia.

查看答案和解析>>

科目：初中英語 來源：2020年重慶市第二外國語學(xué)校中考模擬英語試卷 題型：閱讀單選

How much do you know about Earth—the planet that we live on? Our knowledge of Earth has been developing since ancient times. However, many puzzles (謎) about Earth remain unsolved. Live Science has published a list of the eight biggest mysteries about Earth. Let’s look at some of them.

Where did water come from?

When it first came into being 4.5 billion years ago, Earth was a dry rock. So where did all of our water come from? Scientists think that it might have arrived in the form of ice by an asteroid (小行星) from outer space that hit our planet. But this idea has not been confirmed (證明) because there is very little related evidence(相關(guān)證據(jù)) to be studied.

What’s in the core (地核)?

Scientists used to study meteorites (隕石) as small examples of Earth, believing that Earth’s core was made of iron and nickel (鎳). However, a later study in the 1950s proved this way to be wrong because it found that Earth would be too light to provide gravity (引力) if its core contained only iron and nickel. Today, scientists continue to bring forward different ideas, but none have been confirmed.

How was the moon born?

Scientists have found that the chemical compositions (成分) of Earth and the Moon are very similar. That suggests that the Moon actually came from Earth. For example, it could be a piece of Earth that separated when Earth hit another planet. It is also possible that when Earth first came into being, it spun (旋轉(zhuǎn)) very fast and threw off enough molten (熔化的) rock to later form the Moon.

1.What’s the main idea of the passage?

A.How Earth came into being.

B.Where Earth’s water came from?

C.How the moon was formed?

D.Unexplained mysteries about Earth.

2.What do we know about where water may come from?

A.Earth’s water may come from ice that melted 4.5 billion years ago.

B.Earth’s water may come from a small planet that hit Earth.

C.We don’t know where water came from.

D.There is lots of evidence that tells us where water came from.

3.What does the underlined phrase “bring forward” in Paragraph 5 probably mean?

A.Check B.Raise

C.Improve D.Receive

4.Which of the following is TRUE according to the passage?

A.Scientists used to believe Earth’s core was made of meteorites.

B.A study in the 1950s proved that Earth’s core is made of iron and nickel.

C.The moon and Earth are made of similar materials.

D.Three possibilities of where the Moon came from are mentioned.

查看答案和解析>>

科目：初中英語 來源：2020年重慶市第二外國語學(xué)校中考模擬英語試卷 題型：單選題

—Look, how wonderful this Chinese knot (中國結(jié)) is!

—So it is. Chinese knot is a________Chinese art with a long history.

A.useless B.common C.modern D.traditional

查看答案和解析>>

科目：初中英語 來源：2020年重慶市第二外國語學(xué)校中考模擬英語試卷 題型：聽短對話回答問題

A.By bike. B.By school bus. C.On foot.

查看答案和解析>>

科目：初中英語 來源：2020年重慶市第二外國語學(xué)校中考模擬英語試卷 題型：聽句子選答語

A.Well, I hope so. B.Sure, I will. C.Oh, I forgot it.

查看答案和解析>>

科目：初中英語 來源：湖南省長沙市教育集團(tuán)2018-2019學(xué)年九年級上學(xué)期第一次月考英語試卷 題型：單選題

More and more people are learning Information Technology ________ they can serve the Belt and Road.

A.unless B.so that C.even if

查看答案和解析>>

科目：初中英語 來源：重慶市2019-2020學(xué)年八年級下學(xué)期開學(xué)檢測英語試卷 題型：改寫句子

Tara with her friends set up Animal Helper to help the disabled.(變?yōu)橐话阋蓡柧?

______ Tara with her friends ______ up Animal Helper to help the disabled?

查看答案和解析>>

同步練習(xí)冊答案