Sara found _____interesting photo yesterday. ______ photo was of her grandma.

A. a, the B. an, The C. the, the

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—Do you know which book does n’t belong to the four great classical Chinese novels? — Of course I know , it’s_______.

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—Where is Jack?

— In the sitting room. He _______ TV with his brother.

A. watch B. watched

C. is watching D. was watching

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Humans and animals need oxygen to exist. Without it, most living things will die. But where does oxygen come from? Trees.

Trees can take in much carbon dioxide (二氧化碳) which may be bad for our environment and produce oxygen for us to breathe.

All people know that trees are important to us.

Scientists believe human life would be impossible if there were

no trees on Earth.

Trees are a major source (來源) of food. Apples, oranges, lemons all come from trees.

Humans and animals knew how to get food from trees many years ago.

In fact, many kinds of important medicine come from trees too. Some special things in trees can be used to produce medicine. Also, trees create more beautiful and relaxing environments.

They help protect the soil（土壤）.

1.What is the passage about?

A. Humans. B. Animals. C. Trees. D. Fruit.

2.Which of the following may damage(危害) our environment?

A. Oxygen. B. Medicine.

C. Food. D. Carbon dioxide.

3.What CANNOT people use trees to do'?

A. To produce oxygen.

B. To make food.

C. To create medicine.

D. To destroy the soil.

4.The passage mainly (主要地) wants to tell us______________.

A. trees are not important to animals

B. animals need oxygen to breathe

C. there are few trees in the world now

D. trees can help humans and animals in many ways

5.We may read this passage in a ________.

A. magazine B. travel guide

C. storybook D. newspaper

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Trees can ______ us _____ fruit and are useful and important in our daily lives

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Have you heard about the periodic table (元素周期表) lately? Well, there’s some big news about this special table, but first, remember that the periodic table is used for all the elements（元素）, or things that make up our world.

Elements are all around us. Iron is one of the most common elements found on the earth. You probably know the element oxygen (氧), which is the element that we breathe in all the time. And elements can combine (結(jié)合) to make new things like H2O. This is hydrogen (氫) and oxygen put together, also known as water! Learning about these things helps us better understand the world we live in.

But have you ever noticed something missing in the periodic table? There were already 114 elements. But the seventh row of the table was not finished, until now!

In December, scientists from the IUPAC（國際純粹與應(yīng)用化學(xué)聯(lián)合會) found the four elements that were missing. They are elements 113, 115, 117 and 118.

“To scientists, this is of greater value than an Olympic gold medal,” Ryoji Noyori, a Nobel honored chemist said.

The new elements are heavy metals and were made in lab. These kinds of elements can’t be found in nature. Scientists are still looking for ways to use these elements, and other elements in the eighth row in our daily lives.

Scientists have been working on this for 10 years, but the work is not done. Now they will prepare to look for “element 119 and beyond”. But for now, be mindful (留心的) when you read your science books because the periodic table might be outdated (過時的).

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C. elements 113, 115, 117, 118

D. elements 113, 115, 117, 119

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4.Which of the following about the new elements is NOT true?

A. They are heavy metals.

B. They were made in labs.

C. They can’t be found in nature.

D. They are widely used in our daily lives.

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Sam spends two hours _______ his homework every day.

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