18.-Mum,can you give me some advice on how to behave myself at the table? -Well,I do have some advice.________,please keep quiet while eating.( ?。?/h2>
21.—Why is the Belt and Road Initiative(一帶一路) by the rest of the world? —Because it has helped improve lives of 30 percent of the world's population.( )
46.Do you always disagree with your parents?Or are your parents often(1)
with you?Maybe the relationships(關系) between you and your parents are terrible.In fact,you can change the situation(2)
the following keys. Respect(尊重).It's important to show your respect and care about your parents' feelings.Though you have disagreements,at least try to (3)
what they're trying to tell jye.ai.You shouldn't keep your own thoughts only. Communication.You should get into the (4)
of communicating with your parents in a polite way.You may not get what you want,but explaining your thoughts calmly and rationally(理智地) may show your parents that you are(5)
a kid. Trust.How can your parents put their trust in you?It depends on what you do.For example,if you get home late without calling first,you should (6)
to your parents as soon as you get home.To get their trust,you must pay(7)
to the ways you do things instead of fighting with them.It will make your life much easier. Spending time together.It's(8)
to spend time together to build trust and communication.Your parents may be interested in going shopping,hanging out and playing cards with you.Spending time together will(9)
the " black cloud" hanging over your home. Your parents give all their love to you.Why not (10)
these ways actively to own a happy family as you want?
47.The world is being covered by plastic.In China,the amount of plastic waste rose into 14 million kilograms last year,but only about 9% was recycled.Over 1.32 million kilograms of plastic found its way into the world's oceans,which caused serious pollution.Luckily,researchers have found a special kind of bacteria which can help break down plastic recently. The bacteria are so small that we need a microscope (顯微鏡) to see them.They can "eat" plastic by changing its chemicals into something that will help them grow.The secret to this is enzymes (酶).Bacteria uses enzymes to cause chemical changes. In 2012,in the decaying (腐爛的) leaves,scientists discovered an enzyme called LCC that slowly broke down PET plastic.Most people know PET plastic.It is used in water and soda bottles.Most PET is thrown away,but even when it is recycled,it can't be made into new bottles.Compared with other 100,000 enzymes,it was the best at breaking down PET. To improve LCC,scientists studied the enzyme and the way it broke down the PET.By testing thousands of small changes to the enzyme,they found a new kind of LCC.It can be alive at higher temperatures,eat PET very quickly and make most PET plastic reusable.Scientists were satisfied with the result.When the environment was just right,the new LCC was able to break down 90% of the PET in just ten hours.The old enzyme took about 20 hours and only broke down half of the PET.
(1)How many plastic products are recycled in China last year?
A.About 1.32 million kilograms. B.About 14 million kilograms. C.About 1.26 million kilograms. (2)Which statement is TRUE about the bacteria?
A.Bacteria can be seen with our eyes directly. B.Bacteria can't be used to break down plastic. C.Enzymes help bacteria change chemicals in plastic. (3)From Paragraph 3,we can know
. A.most PET plastic could be made into new bottles again B.an enzyme called LCC was found in PET plastic in 2012 C.LCC was found the best at breaking down PET plastic (4)Compared with the old LCC,which is NOT the advantage of the new kind of LCC?
A.It can be alive at higher temperatures. B.It can make all the PET plastic reusable. C.It can break down PET plastic in a faster way. (5)Where can we probably read this passage?
A.In a storybook. B.In a science report. C.In an advertisement.
William:I want to have a big robot.It can fly and take things anywhere. (2)
Fred:I am good at swimming.I need a robot that can swim with me. (3)
Ellie:I want to make a robot by myself.But I'm afraid that it is too difficult for me. (4)
Linda:I need a smart robot to play with me.It should know how to stand up and jump.It needs to walk a short distance with me every day. (5)
Jack:I would like o have an advanced(先進的) robot.I can pay much money for it.But it should be easy for me to use.
A.Do you want to make your own robot?If yes,then the small two-wheeled robot is perhaps the best choice for you.All you need to do is put all the separate parts together. B.This is a kind of robot that has the human body.It has a head,two arms and two legs just like a human. C.These robots can swim in rivers,lakes and even in the sea.They can take the form of a fish or a snake. D.A robot company makes a new robot named Handle.It can travel short distances at speed of 9 mph and jump up to 4 feet. E.These robots can dance by themselves.And they can also teach people to dance. F.They are expensive compared(比較) to other cheap robots.They need a lot of software to operate.But they are easy for people to use. G.These robots are cool and strong.They can fly up to 50 metres and they can help people do the heavy work.
There is a theory (理論) that if you go through a wormhole (蟲洞),you could meet your past self.If this is true,what advice would you give(1)
the younger you? In the book Wormhole Letters,Chinese writer Wang Yijia writes 74 letters to himself in the past.Interestingly,he uses "M"and"W"as the names of the two people writing to each other.It's like looking into the mirror to see the reflection of(2)
. The topics of the letters go from pursuing (追求) dreams and accepting failure to the importance of reading and learning.There are many stories of the great minds in human history(3)
are very encouraging.If you feel at a loss about life(4)
the future,you can find strength from those stories. As a junior high school student,I also find(5)
book to be useful.The life stories of famous people can be used in our writing,which can better support our argument.