Do you know about bio-plastic(生物塑料)?It is a kind of plastic. but it is not the same as normal plastic. Normal plastic is made from chemical materials and takes a very long time to degrade(降解). But bio-plastic is good for the environment. it is made by using bacteria(细菌) to process(加工)natural sources like vegetable oils, corn or sugar. It can degrade more easily.

But there is a problem with bio-plastic. The "food" that bacteria eat is what we eat. This means that bacteria are competing against humans for the same resources.

Now scientists have found a new way to make bio-plastic-using two kinds of bacteria and sunlight. According to Newsweek.

One of the bacteria can use sunlight to produce sugar. The other land eats the sugar and produces polymers(聚合物). Polymers are used to create bio-plastics. The way the bacteria store polymers is similar as humans store fats.

The new way to produce bio-plastic has many advantages. It is 20 times faster than the normal way we produce bio-plastic. Moreover, using these two bacteria saves resources.

The next problem scientists face is that they want to put their tab research into real-world practice. By doing this, bio-plastic made with these two bacteria can be widely produced in the future.

1.According to the passage, which is TRUE about bio-plastic?

A.It is bad for the environment.

B.It's made from chemical materials.

C.It is a new kind of bacteria.

D.It can degrade more easily.

2.What does the phrase "The food" underlined refer to?

A.Normal plastic. B.Normal bacteria. C.Salty waters. D.Natural sources.

3.From the passage, which is the correct order to make bio-plastic?

a. eating the sugar

b. creating bio-plastics

c. producing polymers

d. using sunlight to produce sugar

A.a-d-c-b B.a-d-b-c C.d-a-c-b D.d-c-a-b

4.What's the main idea of the passage?

A.A new kind of plastic. B.A new way to produce bio-plastic.

C.A way to store fats D.A way to produce two kinds of bacteria.

Choose the best answer(根据以下内容, 选择最恰当的答案)

Are you looking for a good novel? Here, we recommend(推荐)you the best selling of 2019.

Title:The Last Equation(方程式)

By:Stuart Gibbs

Reviewed By:Zara Lee

The police are looking for a special equation. It could destroy the world if the bad people get it. The police turn to Charlie, a 12-year-old girl for help. She is as smart as Albert Einstein. Charlie doesn't have a lot of time to solve the world's problems but she is the only one who can do it. People who like adventure will enjoy reading this wonderful book.

Title: AstroNuts

By: Jon Scieszka

Reviewed By:Richard Mani

In this book, the Earth has been full of rubbish because of humans. Some animals from Mount Rushmore decide to do something. Their mission is to find a new planet fit for human life. Eventually they discover one: Plant Planet. What the writer is trying to tell readers is simple: Do not harm the planet any more.

Title:Stargazing

By:Jen Wang

Reviewed By:Nora Wilson

Moon is new in Christine's school. Christine hears that Moon beats people for fun. Unfortunately, Moon comes to live with Christine's family. And then the two children become best friends. Stargazing is written according to what truly happened to the writer as a child. The story is about the power of friendship and how people are able to change.

Title: Roll with it

By: Jamie Sumner

Reviewed By: Joe Lin

"Roll with It" is a story about a 12-year-old girl named Ellie. She has suffered from cerebral palsy since she was a baby. It makes her hard to walk on her own, so she has to use a wheelchair all the time. When Ellie and her mom move to another place, she must learn to explore a new school. This book is a must-read for everyone. It's a heartwarming story that shows the value of family.

1.What can Charlie do for the police in "The Last Equation"?

A.She can destroy the world B.She can stop the time.

C.She can find Albert Einstein. D.She can save the world

2.Who wrote the book based on his or her own experience?

A.Stuart Gibbs B.Jon Scieszka C.Jen Wang D.Jamie Sumner

3.If a reader cares about the pollution problem, he may be interested in "______".

A.The Last Equation B.AstroNuts C.Stargazing D.Roll with It

4.The underlined word "cerebral palsy" means "a kind of ______".

A.equipment B.illness C.furniture D.place

5.Joe Lin recommends "Roll with it" because ______.

A.it is the most expensive one among these books B.it is an interesting story about a new school

C.he knows everything about Ellie's family D.he is deeply touched by Ellie's story

6.On which website can readers most probably find this passage?

A.www. we-love-books. com B.www. movie-reviewing. com

C.www. the-wonderful-adventure. com D.www. friends-and-families. com

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