Read the following article and select the best answer. Article: Many people hurt their backs when they try to lift heavy things from the floor. It is easy to hurt your back muscle when you try to pick up a heavy thing. However, there is a correct way to lift things from the floor. If you pick up heavy things correctly, you probably will not hurt your back. To lift something from the floor correctly, first bend your knees and lower yourself. Keep your back straight. Do not bent over, from your waist keep your back and hips and waist in a line. If you bent over, the muscles in your lower back can became hurt very easily. If you keep your back and hips straight, the muscles are stronger, because they hold up together. The other muscles can then help the lower back muscles. As you lower yourself, try to get as close to thing as you can, put one knee on each side of the thing. Remember at all times to keep your back straight. Put your hand under the thing that is in front of you, between y our knees. To lift the thing, you should stand up slowly. Use your leg muscles in order to stand up. lift with your legs, not with your back. Question: Many people hurt their backs when they lift something because _ . - they are not strong - the things are very heavy - the way to lift the things is not correct - they are very heavy
the way to lift the things is not correct

(Question)
Read the following article and select the best answer. Article: It started as a game.Wendy and Peter were in River Park.They watched the boats in the river and visited the zoo.They played on the slides and swings.They watched the merry-go-round,but they did not have money for a ride.They ate their sandwiches at a picnic table.Suddenly Wendy jumped up. "I know what to do,"she said."Look at all that junk under the tables.Let's pick it up." So they picked up paper and empty boxes and cans.They put them in the green cans marked"Litter".Peter's dog Stoopy picked up some paper and ran away with it.Peter called him back and took it from him.Then they taught Stoopy to carry trash for them.They put it in the cans.They worked until there was no trash left on the picnic grounds. The next day their friends Mario and Andy came to the park with them.They helped to tidy the picnic grounds again.Then they ran all over the park looking for litter.They tried to see who could find the most.After that,it was a game they played every time they came to the park. One day,a man came with a camera.He watched what they were doing.He asked to take a picture for them.Then he took them all for a free ride on the merry-go-round,even Stoopy.The next day their picture was in the newspaper.It said."Five Litter Lifters at River Park".After that all their friends wanted to be litter lifters.It was the beginning of a club that was a model for others to follow. Question: What does the last part of the story show? - The man with the camera joined the club. - People laughed at the children for picking up trash. - Other children began to help keep the park clean. - People came and took the litter cans away.
(Answer)
Other children began to help keep the park clean.

Ques: Read the following article and select the best answer. Article: 3D printing technology may not be a new thing in some foreign countries. But in May this year, at Shenzhen Convention and Exhibition Center. Many visitors were attracted by a 3D printer. The machine looks similar to an ordinary printer and can print a "statue" in about 90 minutes after scanning anything, including a person. The printer prints layer by layer. For example, if we want to print a 30-cm-tall statue, the computer will calculate* the layers and print 460 layers in total*. It can also print people and clothes. You can stand for scanning for just about three minutes, and a statue will be finished about two hours. The cost for a statue of a man is about 1000yuan. The printer, which costs about 500,000yuan, is from the USA. "We want to introduce this technology to people, and find more chances here." said an engineer, "There is a company in USA that offers 3D printing services to people. Many people come to design their own thing. It is very cool. We hope that the printer will encourage more Chinese people to be more creative." Question: A 3D printer _ . - is a common machine - prints layer by layer - can make clothes and people - is widely used in Shenzhen
Ans: prints layer by layer

(Q).
Read the following article and select the best answer. Article: Near the North Pole there are only two seasons:winter and summer.In winter,nights are long.For more than two months you can't see the sun,even at noon.In summer,days are long.For more than two months the sun never sets and there is no night at a11.The temperature is very low near the North Pole.Even in summer the temperature is below 0degC.So people there wear warm clothes all year round.They make their clothing from the skins of animals.From the skins they also make coats,hats and even boots. In the cold climate,plants cannot grow.So the people have to build their houses with skins,earth,stone or snow.When they go out to hunt something,they live in tents of skins.When they move,they take their tents with them.Sometimes,they build houses of snow.Now don't think that these houses must be cold.In fact,they are very warm and safe. The life near the North Pole is very interesting. Question: Near the North Pole you can't see _ . - animals - stone houses - plants - tents of skins
(A).
plants

Ques:Read the following article and select the best answer. Article: There are many expressions with heart.One of them is "lose your heart to someone".When that happens,you have fallen in love.But if the person who "won your heart" does not love you,then you are sure to have a "broken heart".In your sadness,you think that the person you loved is "hard-hearted",and in fact,has a "heart of stone". You may decide to "pour out your heart" to a friend.Telling someone about your personal problems can often make you feel better. If your friend does not seem to understand how painful your broken heart is,you may ask her to "have a heart".You are asking your friend to show some sympathy for your situation.Your friend "has her heart in the right place" if she says she is sorry for how you feel. If your friend says,"My heart bleeds for you",she means the opposite.She is a cold--hearted person who does not really care about your situation. When you are feeling afraid,"your heart is in your mouth".You might say,for example,that your heart was in your mouth when you asked a bank to lend you some money to pay for a new house. If that bank says no to you,do not "lose heart".Be "strong-hearted".Sit down with the banker and have a "heart to heart" talk.Be open and honest about your situation.The bank may have a "change of heart" and agree to lend you the money.Then you could stop worrying and "put your heart at rest". Question: If your friend says,"My heart bleeds for you",she may _ . - not know about her health problem - have a heart trouble - not care much about you - want to know what happened

Ans:
not care much about you